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UPSC NDA II 2023 Mathematics Solved Paper

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Consider the following for the next five (05) items that follow :

Three boys

P, Q, R

and three girls

S, T, U

are to be arranged in a row for a group photograph.

[NDA II 2023]

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Question : 116 of 120

Marks: +1, -0

What is the probability that all three boys sit together?

$\frac{1}{5}$
$\frac{1}{4}$
$\frac{1}{3}$
$\frac{1}{12}$

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