Question

An urn contains 17 white balls and 9 green balls. A sample of seven is selected at random. What is the probability that the sample contains at least one green ball?

a) 1.0000

b) 0.8307

c) 0.9704

d) 0.0000

e) 0.1693

f) None of the above.

Answer 1

Answer:

Given that:

An urn contains 17 white balls and 9 green balls. A sample of seven is selected at random.

Urn contains 17 white balls and 9 green balls

You are selecting 7 balls at random

The probability of getting at least one green ball is same as 1- probability of getting no green ball

i,e

Option (c) is correct answer