Binomial Distribution Help Pleaseeee its my last homework question

Question

The Mountain States Office of State Farm Insurance Company reports that approximately 70% of all automobile damage liability claims were made by people under 25 years of age. A random sample of seven automobile insurance liability claims is under study.For samples of size 7, what is the expected number of claims made by people under 25 years of age? (Round your answer to the nearest whole number.)

Answer 1

For a binomial distribution B(n,p) the expected value is the

 

mean = n*p = 7*.7 = 4.9 ~ 5