Symbiosis National Aptitude Test SNAP 2018 Paper

Question : 41 of 130

Marks: +1, -0

Sonal and Meenal appear in an interview for same post having two vacancies. If 1/7 is Sonal's probability of selection and 1/5 is Meenal's probability of selection then what is the probability that only one of them is selected?

Validate

Solution:

Probability for not selecting Sonal =

1-1/7

6/7

Probability for not selecting Meenal =

1-1/5

4/5

Probability for exactly one get selected.
=

1/7(4/5)+6/7×1/5

4/{35}+6/{35}

{10}/{35}

2/7

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