Question

A DELL computer hardware has a yearly 17% rate of failure. Answer the following question. Round the answer up to six decimals; leave them in decimal form.

What is the probability that, if you buy four (4) computers, at least one (1) computer will not fail?!

Answer 1

Probability that all four computers will fail:
P 1 = 0.17 x 0.17 x 0.17 x 0.17 = 0.000835
Probability that at least one will not fail :
P = 1 - P 1 = 1 - 0.000835 = 0.999165
Answer: C ) 0.999165 = 99.9165 %