GRE Question of the Day (September 20th)

Math

A string of 10 lightbulbs is wired in such a way that if any individual lightbulb fails, the entire string fails. If for each individual lightbulb the probability of failing during time period T is 0.06, what is the probability that the string of lightbulbs will fail during time period T ?

A. \({0.06}\)

B. \({(0.06)^{10}}\)

C. \({1 - (0.06)^{10}}\)

D. \({(0.94)^{10}}\)

E. \({1 - (0.94)^{10}}\)

Correct Answer - E - (click and drag your mouse to see the answer)

Question Discussion & Explanation