Question

Find the probability. An IRS auditor randomly selects 3 tax returns (without replacement) from 47 returns of which 5 contain errors. What is the probability that she selects none of those containing errors?

A. 0.0012

B. 0.0006

C. 0.708

D. 0.7136

Answer 1

she needs to select 3 from the 42 correct tax returns ,so prob=1/42

Answer 2

sorry, 3/42

Answer 3

still dont understand

Answer 4

of the 47 tax returns, she needs to select the correct ones. 5 are wrong,so there are 42 correct. now 3 tax returns will randomly be chosen by her, and this has a probability of 3/42

Answer 5

ohhhh thanks

Answer 6

anytime

Answer 7

A) 0.0012

Answer 8

We will apply combinations formula here.