Are 10% of M&M Candies Blue? Mars, Inc., claims that 10% of its M&M plain candies are blue, and a sample of 100 such candies is randomly selected.

a. Find the mean and standard deviation for the number of blue candies in such groups of 100.

b. Data Set 19 in Appendix B consists of a random sample of 100 M&Ms in which only 5 are blue. Is this result unusual? Does it seem that the claimed rate of 10% is wrong?