Suppose that 20% of all copies of a particular textbook fail a certain binding strength test. Let X denote the number of books among 15 randomly selected copies that fail the test. Find the probability, to 3 decimal places, that at least 7 copies fail the test. QUESTION 13 O a. 0.018 O b.0.986 OC. 0.982 O d. 0.014
Percentage
A percentage is a number indicated as a fraction of 100. It is a dimensionless number often expressed using the symbol %.
Algebraic Expressions
In mathematics, an algebraic expression consists of constant(s), variable(s), and mathematical operators. It is made up of terms.
Numbers
Numbers are some measures used for counting. They can be compared one with another to know its position in the number line and determine which one is greater or lesser than the other.
Subtraction
Before we begin to understand the subtraction of algebraic expressions, we need to list out a few things that form the basis of algebra.
Addition
Before we begin to understand the addition of algebraic expressions, we need to list out a few things that form the basis of algebra.
questions 13, 14 and 15 please they are multichoice thank you
![QUESTION 13
Suppose that 20% of all copies of a particular textbook fail a certain binding strength test. Let X denote the number of books among 15 randomly selected copies that fail
the test. Find the probability, to 3 decimal places, that at least 7 copies fail the test.
a. 0.018
O b.0.986
O C. 0.982
O d. 0.014
QUESTION 14
Suppose that two fair, 6-sided dice are tossed. What is the probability that the sum of the two scores equals 10 given that it is strictly greater than 7?
O a. 1/7
O b.3/36
OC. 15/36
O d. 1/5
QUESTION 15
For any two random variables X and Y, choose all the correct answers:
Note that you will get a penalty mark for choosing an incorrect answer.
There is no penalty for not choosing a correct answer, but also no marks are awarded for a correct answer that is not selected.
· If X and Y are uncorrelated then X and Y are independent.
a.
O b.if X and Y are independent then X and Y are uncorrelated.
OC. If X and Y are independent then P(X=x,Y=y) = P(X=x)P(Y=y) for every x and y.
O d. if x and Y are independent then P(X=x|Y=y) = P(X=x) for every x and y.
Ue. If X and Y are independent then for every x and y. PIX = x) = [ odds(X =x|Y =y)]/[1+odds(X = x | Y = y)]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F59a2ede3-6d85-4bad-a299-e45a2d367652%2F8d425ac9-b088-4178-a2cd-165763bb4ba4%2Fbgvs6bl_processed.png&w=3840&q=75)
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