Question

What's with the (20C19)? And (20C20)? I never learned anything about putting a c in between two numbers in class nor the textbook. 

Expand

Expert Answer

1 Rating

Want to see the step-by-step answer?

Check out a sample Q&A here.

Want to see this answer and more?

Experts are waiting 24/7 to provide step-by-step solutions in as fast as 30 minutes!*

*Response times may vary by subject and question complexity. Median response time is 34 minutes for paid subscribers and may be longer for promotional offers.
Tagged in
Math
Probability

Probability Distributions

Related Probability Q&A

Find answers to questions asked by students like you.

Q: Let Z be the standard normal variable. Find the values of z if z satisfies the given probabilities. ...

A: a) It is given that the area to the right of z is 0.9616.

Q: The mean IQ score for adult males is 99.6 with standard deviation 14.7.  If Bob's IQ is 109, find th...

A: Given mean of the IQ scores= 99.6  Standard deviation= 14.7 Bob's IQ= 109   

Q: A student poll measured the following variable on LMU students: Commuter Status (Yes/No) Is this var...

A: Commuter Status is a quality, so it is a qualitative variable.   

Q: Fill in the Venn Diagram and answer the questions below. A survey of 4000 local high school students...

A: The number of students, who take French is 2,000. That is, n(F) = 2,000. The number of students who ...

Q: Suppose 140 geology students measure the mass of an ore sample. Due to human error and limitaions in...

A: According to the empirical rule, 68% of the data values fall between 1 standard deviation about mean...

Q: find the expected value of the probability experiment with outcomes X1, X2,... x1=2, x2=6, x3=4, x4=...

A: We have to use the expectation formula    

Q: A fruit-packing company produced peaches last summer whose weights were normally distributed with me...

A: Click to see the answer

Q: A game consists of rolling a die. If the die shows 6, the player wins $10. If the die shows a 3,4,5 ...

A: We first make a probability distribution  outcome 1 2 3 4 5 6 winning amount (xi) 0 0 1 1 1 10 ...

Q: Gertrude will open a movie theatre in the town of Northern Millstone on July 20th, 2020. Assume the ...

A: Conditional probability of two events: The conditional probability is the probability of one event g...

Q: A lawyer considers taking a case figures that there is a 40% chance of winning the case in court and...

A: Solution: From the given information, it can be observed that the probability of winning the case in...

Q: Let the sample space be S = {p, e}. How many events are there?

A: Solution: From the given information, the sample space is Here, the number of outcomes in the sampl...

Q: Assigned Media Question Help Dr. Hahn has developed a new procedure that he believes can correct a l...

A: Let X= number of people who shows improvement  Given the probability of success= 77%=0.77 probabilit...

Q: Paul Hunt is considering two business ventures. The anticipated returns (in thousands of dollars) of...

A: Click to see the answer

Q: 5.4.19-T Question Help The heights of fully grown trees of a specific species are normally distribut...

A: Click to see the answer

Q: how do you work a,b, and C? Thanks!

A: a. The line is drawn on the graph to shown the trend. The shape is linear because as the value in ...

Q: Assume that a normal distribution of data has a mean of 12 and a standard deviation of 3. Use the em...

A: Click to see the answer

Q: You are playing a game in which a single die is rolled. If a 2 or a 5 come up, you win $60; otherwis...

A: We will make a probability distribution of the winning values outcome 1 2 3 4 5 6 ...

Q: Find C(n, x)pXqn – x for the given values of n, x, and p. (Round your answer to four decimal places....

A: Binomial distribution: The binomial distribution gives the probability of number of successes out of...

Q: 2 8. The probability that an event E occurs is =. What are the odds that E will NOT occur? 5

A: Odds that E will not occur means, odds against E. We will use the odds against property of probabili...

Q: Professor Easy's final examination has 12 true-false questions followed by 3 multiple-choice questio...

A: A true-false question has 2 choices.  So 12 questions have 2 choices each.  Those 12 true-false ques...

Q: Lorelai conducted a survey of students in her class to observe the distribution of eye color. The ta...

A: Total number of people observed= (40+58+7+14)=119  Among these 119 people, 40 has blue eyes  

Q: Each question on a multiple-choice exam has four choices. One of the choices is the correct answer, ...

A: We make a probability distribution for the scores  Each question has probability = 1/4 =0.25 of bein...

Q: ectricalc has determined that the assembly time for a particular electrical component is rmally dist...

A: Click to see the answer

Q: Recall from Example 1 that whenever Suzan sees a bag of marbles, she grabs a handful at random. She ...

A: Given that:  She has seen a bag containing three red marbles, four green ones, three white ones, and...

Q: Al Jebra is ordering his new bicycle from Brenda's Bike Boutique.  Al knows that he wants the Grand ...

A: Number of choices for color= 12  Types of sidecar= 2 Types of phone mount= 2  

Q: The manager of a supermarket found that 72% of the shoppers who taste a free sample of a food item w...

A: Let X= number of shoppers that will buy the item who taste a free sample Given that the probability ...

Q: draw a Venn diagram for n(U) = 10, n(A')= 4, n(AUB)= 9, n(B')= 5

A:  

Q: Consider the joint probability distribution below: A) What is the P(A = true)? Provide the individua...

A: Given Joint probability distribution as shown below a)P(A = true) = P(A = true, B = false, C = false...

Q: A student council consists of 15 students. (a) In how many ways can a committee of seven be select...

A: Combination Rule: There are n different items and r number of selections and the selections are made...

Q: Jane and Sam work in the same department for a large corporation. They are curious about the proport...

A: Simple random sampling: If a sample of n subjects is selected then every unit in the population has ...

Q: Find the following:

A: a)  

Q: A linear model to predict an adult male's height (in inches) based upon their weight (in pounds) is ...

A: We compare the given equation with y=mx+b So, m=0.34 and b=7.9  slope= m =0.34         

Q: The Following are the scores of 20 students who took a calculus exam. Find the mean and standard dev...

A:  

Q: (a) How many ways can the letters of the word BECOMING be arranged in a row?   (b) How many way...

A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question s...

Q: Suppose that 7 cards are drawn from a​ well-shuffled deck of 52 cards. What is the probability that ...

A: It is given that the number of cards are drawn from a well-shuffled deck of 52 cards is 7.

Q: i) If volume is high this week, then next week it will be high with a probability of 0.6 and low wit...

A: Given that i) If the volume is high this week, then next week it will be high with a probability of ...

Q: The probability that a person is accepted for admission to a specific university is 0.6. Determine t...

A: Introduction: If X ~ Binomial (n, p), then the probability mass function of X is: Here, n is t...

Q: TRUE or FALSE  For events A and B in a sample space, P(A|B) + P(A|Bc) = P(B).

A: Introduction: Suppose A and B are two events of interest in a sample space, with respective probabil...

Q: . The cumulative distribution function F of a discrete random variable X is given by Find the probab...

A: Introduction: If the cumulative distribution function (cdf), F (x) of a discrete random variable, X ...

Q: In a shooting competition, if a participant hits the target he gets 5 points, and if he misses he lo...

A: Probability of hitting the target = 0.7  So the probability of not hitting the target= 1 - 0.7= 0.3 ...

Q: 5. If the error for estimating µu was within 4 units, how many should we sample at 98% Confidence le...

A: Given information- Error, E = 4 units Confidence level, c = 98% Standard deviation, s = 29 Margin of...

Q: Jane and Sam work in the same department for a large corporation. They are curious about the proport...

A: For the case: Jane obtains a list of all the workers in the department, randomly picks 20 names from...

Q: Use the multiplication principle to calculate the probabilities of all the outcomes listed below. Yo...

A: The probability of intersection of two independent events A and B is simplified as, P(A∩B)=P(A)⋅P(B)

Q: 9. Determine whether it is usual or unusual Determine whether the score 33 is usual or unusual when ...

A: We find the z score of 33   

Q: 13. The heights of 1000 students are approximately normally distributed with a mean of 174.5 cm and ...

A: a) The expectation and standard deviation of the sampling distribution of the sample mean are as fol...

Q: A set of n = 8 ordered pairs has the following sums.     x      = 111     x2  ...

A: Click to see the answer

Q: urvey of a group's viewing habits over the last year revealed the following (ii) 29% watched basebal...

A: Click to see the answer

Q: Let X, Y have range [0,3] and a marginal density functions, fx(x) = kx² an (a) Find k and the cdf of...

A: Solution: a. From the given information, the density function of x is The value of k can be calcula...

Q: As the manager of the human resources department at your firm, you are investigating the number or s...

A: Click to see the answer

Q: Use the approximate​ half-life formula for the case described below. Discuss whether the formula is ...

A: Given that the initial population = 10000  Decline rate = 7% = 0.07  So the equation for the populat...