4 boys and 2 girls occupy seats in a row at random. Then the probability that the two girls occupy seats side by side is
A
12
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B
14
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C
13
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D
16
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Solution
The correct option is D13 Girls sit side by side, it means both girls are seated together in 2! ways Let n(E)=4 boys and 2 girls occupy seats side by side =5!2! n(S)=6! ∴ Required probability=5!2!6!=26=13