You take an exam that contains 20 multiple-choice questions. Each question has 4 possible options. You know the answer to 10 questions, but you have no idea about the other 10 questions so you choose answers randomly. Your score X on the exam is the total number of correct answers. Find the PMF of X. What is P(X > 15)?

Q: There are some apples and oranges in a fruit basket. If Eve eats 2 apples, the number of apples left…

A: Let x be the number of apples and y be the number of orange inthe fruit basket.

Q: A box contains the same number of blue and red marbles. If we put 3 red marbles and 1 blue marble ,…

A:

Q: An aerosolized vaccine for measles was developed in Mexico and has been used on 4 million children…

A: As per the questionLet X be the random variable that denotes number of children who developed an…

Q: Griffen has 3 less than 2 times as many stickers as Robin. Griffen has 25 stickers. How many does…

A: Please go through the questions word by word. First assume that Robin has x stickers & then…

Q: A number w increased by 3 is greater than – 18.

A:

Q: On two​ examinations, you have grades of 84 and 92. There is an optional final​ examination, which…

A: Let x = optional final score        T = Total Scores = 84 + 92 + x         n =number of tests = 3…

Q: Three brothers and their wives decide to have childrenuntil each family has two female children.…

A: Given: Each family needs two female children. So the total number of female children r, is 2+2+2=6…

Q: A class average mark in an exam is 70. The average of students who scored below 60 is 50. The…

A: Let x students scored below 60 and y students scored 60 or more.  So, x+y=20  the total number of…

Q: Suppose that you are taking a course that has four tests. The first three tests are each worth 20%…

A:

Q: how many the chances

A: Consider that a general coin has a number on one side, and an image on the other side. The numbered…

Q: Savings account X,savings account Y,and savings account Z all offer APRs of 3.75%.However, savings…

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Q: (a) Ayisha scored 18 marks more than what he did in the previous examination in which he scored 30.…

A:

Q: Which battery has the greater median? A Rejuvenate has a greater median by about 10 days. Rejuvenate…

A: Median: It is the middle most (mid point) value of the data that divides the whole data into two…

Q: In a population of N = 10 scores, the smallest score is X = 8 and the largest score is  X = 20. What…

A: According to the provided information, Smallest score = 8 Largest score = 20

Q: Average In a class of 25 students, the average score is 84. Six students in the class each received…

A: To find the average score of the remaining students.

Q: In a video game you can earn point for passing a level and also a bonus, which is a percentage of…

A: Tokens earned in each level = t  points earned for each level = 3000 + .25t

Q: Frankie must have an average mark of 50% to pass her art history class. There are 6 equally weighted…

A: Frankie average marks of 6 tests to pass art history class = 50% Average marks received on 4 tests =…

Q: rofessor Gill has taught General Psychology for many years. During the semester, she gives three…

A: Using the excel we can run the regression analysis The three results are as follows : (Data tab >…

Q: The number of students who involved in only two of these activities is .... the number of students…

A:

Q: 3. A test worth 100 points and having 28 problems is broken down into 3-point problems and 4-point…

A:

Q: Solve by the method of your choice:A medical researcher needs 6 people to test the effectiveness of…

A: Given : A medical researcher needs 6 people to test the effectiveness of an experimental drug. If 13…

Q: The youngest of the three people, whose total age is 100, is 12 years less than the oldest and 7…

A:

Q: The Jazz Band needs to raise at least $600 to travel co an upcoming competition. The members of the…

A: Since you have asked multiple question, we will solve the first question for you as per our guide…

Q: Susan’s average score for her first three psychology exams is 84. What must she get on the fourth…

A: Let a denotes the sum of the first three exam scores and let b denotes thescore on the fourth…

Q: With x people on board, a South African airline makes a profit of (960−3x) rands per person for a…

A: Given problem:- With x people on board, a South African airline makes a profit of (960−3x) rands per…

Q: The number of people on the school board is represented by x. Two subcommittees with an equal number…

A:

Q: A Basketball player has successfully made 36 of his last 48 free throws. Find the number of…

A: Let x be the number of free throws.

Q: Lisa has two choices of route when she goes to school. Route A always takes 15 minutes. Route B…

A: For route A , Lisa takes 15 minutes to go to school. For route B , Lisa takes 12 minutes to go to…

Q: John has 3 apples more than his friends Paul. Paul has x number of apples. Together,they have at…

A: Paul has atleast 5 apples.

Q: Solve by the method of your choice: A stock can go up, go down, or stay unchanged. How many…

A:

Q: A student receives test scores of 62, 83, and 91. The student's term project score is 88 and the…

A:

Q: ) A corporate team-building event costs $2 for every attendee. How many attendees can there be, at…

A: Answer

Q: Alex wants to know if his students prefer a chocolate flavor to a chocolate mint flavor. He counts…

A: In hypothesis testing we test the hypothesis regarding the population parameter.

Q: Caroline is taking a multiple choice test with a total of 40 points available. Each question is…

A:

Q: Find how many quarts of 5​% butterfat milk and 1​% butterfat milk should be mixed to yield 120…

A:

Q: Bob's bowling league had an average score of 212 and a SD of 8.  Bob's average is 224. Marietta's…

A: From the provided information, Bob’s bowling league average score (µ) = 212 and standard deviation…

Q: Q2 /: A society consisting of (1000) families, the average income of families is to be studied,…

A: Given : A society consisting of 1000 families. The average income of the families to be tested

Q: Hailey wants to brighten up her front yard by adding some flowers. She decides on zinnias and…

A: Given, Hailey wants to brighten up her front yard by adding some flowers. She decides on zinnias and…

Q: A roast turkey is taken from an oven when its temperature has reached 190 degrees Fahrenheit and is…

A: This is a problem with Newton's law of cooling.

Q: Michael is taking 4 courses during the present term. In each course, he can receive one of 5…

A: Introduction: It is required to find the number of possible combinations of grades that the student…

Q: Solve by the method of your choice: Baskin-Robbins offers 31 different flavors of ice cream. One of…

A: Given:  Baskin - Robbins offers 31 different flavors of ice cream. One of its items is a bowl…

Q: To get a B in​ math, Alex must average at least 80 on her five tests. Scores on the first four tests…

A:

Q: 4) Perimeter of a triangle is 51. If one side is 2 more than 5 times the smallest side and the other…

A: Solution Question 4 Given, Perimeter of triangle = 51  one side is 2 more than 5 times the smallest…

Q: The Hotwheels Rent-A-Car Company derives an average net profit of $1 per customer if it services 50…

A: Given query is to find the number of the number of customers for maximum profit.

Q: A group of students attend a science competition over the weekend. There are 12 students each from…

A:

Q: d) studies more than 2 hours e) studies less than 2 hours f) studies more than 2 hours given that he…

A: Here as per POLICY I HAVE CALCULATED 3 SUBPART PLZ REPOST FOR REMAINING

Q: The mean of three numbers is 14. Two of the numbers are 10 and 6. What is the third number?

A: Step-by-Step Process to Find the Mean Step 1:  Add up all the numbers.  The result is called the…

Q: S3.75 is made up of quarters and half dollars. If the number of quarters  exceeds the number of…

A:

Q: To get an A in a course, you need an average of 90% or better on four tests that are worth 100…

A: Given:

Q: Jayson can take two routes to get to school. Route A takes 10 minutes without traffic, but 15…

A: We use estimation method to solve this question