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The probability of occurrence of two ...

The probability of occurrence of two events A and B are `1//4` and `1//2` respectively . The probability of their simultaneous occurrence is `7/50`. Find the probability that either A or B must occur.

A

`61/100`

B

`29/100`

C

`39/100`

D

`56/99`

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The correct Answer is:
A
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