Question

Two cooling fans are installed in some laptop computers. Suppose the reliability of each cooling fan is 0.92. What percent improvement in reliability does adding the second fan provide

Answer 1

Answer:

8%

Step-by-step explanation:

Given that:

Reliability of each = 0.92

r = 0.92

1 - (1 - r)(1 - r) = 1 - (0.08)(0.08) = 1 - 0.0064 = 0.9936

Percentage improvement :

1 - (0.9936) / r

1 - (0.9936 / 0.92)

1 - 1.08

= - 0.08

= 0.08 / 100 = 8%