Question

4.1 Medical literature indicates that 45% of men suffer from alopecia. For a randam sample of eight men, calculate the probability that:

4.1.1. Exactly four men suffer from alopecia.

4.1. 2. At most two men suffer from alopecia.

4.2 A remote controlled helicopter is one of the many toys manufatcured by Bernie Corpoation. The assembly time for this toy follows a normal distribution with a mean of 75 minutes and a standard diviation of 5 minutes. The compony closes at 5pm evry day. If one worker starts assembling a helicopter at 4pm, what is the probability that he will finish this job before the company closes for the day?

Answer 1