# MATH302_Week 3_Quiz.rtf - If random variable X has a...

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If random variable X has a binomial distribution with n =10 and P(success) =p =0.2, find the probability
Approximately 8% of all people have blue eyes. Out of a random sample of 20 people, what is the probability that at most 2 of them have blue eyes? Round answer to 4 decimal places.
Suppose a random variable, x, arises from a binomial experiment. If n = 14, and p = 0.13, find the standard deviation. Round answer to 4 decimal places.
Approximately 10% of all people are left-handed. If 200 people are randomly selected, what is the expected number of left-handed people? Round to the whole number. Do not use decimals.
If random variable X has a binomial distribution with n=15 and P(success) =p= 0.6, find the mean of X. That is, find E(X). Round to the whole number. 9
The table shows a random sample of musicians and how they learned to play their instruments. Gender|Self-Taught|Studied in School|Private Instruction|Total| Female| 12 | 38 | 22 | 72 |
Male | 19 | 24 | 15 | 58 | Total | 31 | 62 | 37 | 130 | Find P(musician is a female AND had private instruction).
A baseball team has a 20-person roster. A batting order has nine people. How many different batting
There are 4 answers for a single question on the exam and only one answer is correct. If a student guesses the answer for this question, what is the probability that the student selects the correct answer? (round to 2 decimal places)
Find the probability of rolling a sum of two dice that is a 7 or a 12. Round answer to 4 decimal places.
6 (6, 1) (6, 2) (6, 3) (6, 4) (6, 5) (6, 6) Only 7 ways to sum to exactly 7 or exactly 12 7/36