Question

80 bulbs are selected at random from a lot and their time (in hours) is recorded in the form of a frequency table given below

One bulb is selected at random from the lot. The probability that its life is 1150 h, is
A. `1/80`
B. `7/16`
C. 0
D. 1

Answer 1

Correct Answer - C
Total bulb in a lot, n(S)=80
Number of bulbs whose life time is 1150, n( E)=0
`therefore` Probability that its life time is 1150h `(n(E))/(n(S))=0/80=0`
Hence, the probability that its life time is 1150 is 0.