Question: Computers in Elementary Schools. Elementary and secondary schools were classified by the number of computers they had. Choose one of these schools at random.

Computers 1-10 11-20 21-50 51-100 100+

Schools 3170 4590 16,741 23,753 34,803

Choose one school at random. Find the probability that it has

a. 50 or fewer computers

b. More than 100 computers

c. No more than 20 computers