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

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

Find the probability that bulbs selected randomly from the lot has life less than 900 hours.

Text Solution

Verified by Experts

The correct Answer is:
`9/(16)`
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Knowledge Check

  • A page is selected at random from a book. The probability that the digit at units place of the page number chosen is less than 7 is

    A
    `(3)/(10)`
    B
    `(7)/(10)`
    C
    `(3)/(9)`
    D
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