Question

If the chance that any of five telephone lines is busy at any instant is 0.01, then what is the probability that all the lines are busy?

Answer 1

Answer: 1 in 100 million

Explanation:

multiply .01 by itself five times (.01 to the fifth power, or .01⁵)

this gives you .0000000001, or 1 in 100,000,000.

hope this helps!