GRE Subject Test: Math : Binomial Distribution

Study concepts, example questions & explanations for GRE Subject Test: Math

varsity tutors app store varsity tutors android store

Example Questions

Example Question #1 : Binomial Distribution

A fair coin is tossed 15 times. What is the probability of observing less than 3 heads?

Possible Answers:

Correct answer:


This problem uses the Binomial Distribution: 

For this problem n is the number of trials, or 15. Because the problem stated that the coin was a fair coin the probability of heads is one half, or .5.

The binomial distribution is a discrete distribution so the expression x<3 has to be broken down.

Adding the probabilities will give the final answer.

Learning Tools by Varsity Tutors

Incompatible Browser

Please upgrade or download one of the following browsers to use Instant Tutoring: