1. Sweetwater and Associates write weekend trip insurance at a very nominal charge. Records show that the probability that a motorist will have an accident during the weekend and file a claim is 0.05.

Suppose they wrote 20 policies for the coming weekend, what is probability that exactly two claims will be filed

2.Chances are 50-50 that a newborn baby will be a girl. For families with 5 children, what is the probability that all the children are girls?

3

For the normal distribution, the mean plus and minus 1.96 standard deviations will include about what percent of the observations?