13. Suppose a bag contains the letters to spell
a) How many four-letter arrangements are
possible using these letters?
I made 4 separate cases (no double letters, i doubles, b doubles, both b and i doubles) and added them to get 3074 ways. Dunno if this is correct
b) What is the probability that Barb
chooses four letters from the bag in the
order that spell her name?
d) What four-letter arrangement would be
most likely to be picked? Explain your
One containing at least one i and b.
Can anyone tell me if i did this correctly, the solutions does not have the answer for this question.