Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.

A certain cross of rat will result in white-black in the ratio of 8:5.?

a) What is the probability that among 9 such offspring, 5 will be white? (accurate to 4 decimal places)

b) What is the expected number of black rats from part a)?

There are no answers yet.
Be the first to answer this question.