In how many ways could you arrange the following crayons in a color box?
4 crayons from a box of 12?
A six­letter permutation is selected at random from the letters in the word FROSTY.
a. How many permutations are possible?
b. How many begin with the letter T?
c. What is the probability that the permutation begins with a T and ends with an O?
d. What is the probability that the word is FROSTY?
ON your spring break camping trip the probability of you breaking your arm is 0.07 and the probability of spraining your ankle is 0.12. What is the probability that you will
a. not break an arm?
b. not break an arm nor sprain an ankle?
c. get at least a broken arm or a sprained ankle?
I. M. Smart has a 30% probability of making an A in any one course he is taking. He takes 5 courses. Find his probability of making exactly three A's.