Statistic question Just need to get a start at it?

14. The Board of Realtors of a small city reports that 80% of the houses that are sold have


been on the market for more than 6 months. The Board takes a random sample of 15


homes that have recently been sold and counts the number that were on the market for


more than 6 months. What is the Probability that of 15 homes in the sample:





a. less than 12 have been on the market for more than 6 months?


b. between 8 and 13 have been on the market for more than 6 months?


c. at least 10 homes have been on the market for more than 6 months?


d. at most 4 have been on the market for more than 6 months?

Statistic question Just need to get a start at it?
b... think of 80 % as 4/5 ... divide 15 by 5 =3. so so then 3*4=12... pick the answer that 12 fits into