It is given that correct answer to our today's question is not an even numbered option out of given

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06 Aug 2018 Probability

It is given that correct answer to our today's question is not an even numbered option out of given 10 options. A user who knows this makes a random guess out of non even options. What is the probability that his guess is right?

OPtion

1) 2/5
2) 3/7
3) 1/5
4) 1/10
5) 1/3
6) 4/7
7) 2/7
8) 3/10
9) 5/9
10) None of these

Solution

Number of odd options/even options = 5
User randomly selects one option out of 1, 3, 5, 7, 9.So, probability that his guess is right = 1/5

Correct Option: 3 Best Solution (1)