Question

4. 230 bulbs are selected at random from a lot and
their lifetime (in hrs) is recorded in the form of
frequency table given below:
Lifetime 250 500 750 1000 1250
(in hours)
Frequency 22 63 46 69 30
What is the probability that a bulb selected
randomly from the lot has life less than 1000 hours?
TA1​

Answer 1

Answer:

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