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80 bulbs are selected at random from a l...

`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

Text Solution

Verified by Experts

The correct Answer is:
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.
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