Question

Two tube lights are installed in a room. Probability of light a failing is 0.20 while the probability of light b failing is 0.15. What is the probability that both the lights are working on a given day?

Answer 1

0.35

probability of light a failing is 0.20

probability of light b failing is 0.15

the probability that both the light are working on a given day =0.20+0.15=0.35

Answer 2

Answer:

Step-by-step explanation:

The probability that tube light A is working on a given day is

1 - 0.2 = 0.8

The probability that tube light B is working on a given day is

1 - 0.15 = 0.85

Therefore, the probability that both tube lights are working on a given day is the product

0.8*0.85 = 0.68