Simple statistic binomial distribution

Question

In a recent survey, 35% indicated chocolate was their favorite flavour of ice cream. Suppose that we select a sample of 10 people and ask them to name their favourite flavour of ice cream.


a) How many of those in the sample would you expect to name chocolate?


b) What is the probability exactly four of those in the sample name chocolate?


c) What is the probability four or more name chocolate?

Answer 1

Since this is a binomial distribution what is formula you use to calculate a binomial probability and what is the formula for the mean of the distribution?