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In a certain recruitment test with multi...

In a certain recruitment test with multiple choice questions, there are four options to answer each question, out of which only one is correct. An intelligent student knows 90% correct answers while a weak student known only 20% correct answers. If an intelligent student gets the correct answer for a question, then the probability that he was guessing it, is

A

0.03

B

0.27

C

0.4

D

`0.50`

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The correct Answer is:
D
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