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In a college, 30% students fail in physi...

In a college, 30% students fail in physics, 25% fail in Mathematics and 10% in both. One student is choosen at random. The probability that she fails in physics, if she has failed in Mathematics is

A

`1/10`

B

`2/5`

C

`9/20`

D

`1/3`

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The correct Answer is:
B
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