1 Many newspapers carry a certain puzzle in which the reader

1) Many newspapers carry a certain puzzle in which the reader must unscramble letters to form words. How many ways can the letters of WSILUTA be arranged? Identify the correct unscrambling, then determine the probability of getting that result by randomly selecting one arrangement of the given letters.

How many ways can the letters of WSILUTA be arranged?

2) If a couple plans to have 55 children, what is the probability that there will be at least one boy?

Assume boys and girls are equally likely. Is that probability high enough for the couple to be very confident that they will get at least one boy in 55 children?

The probability is nothing .

Solution