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JEE Main Mathematics question

MathematicsPermutations and CombinationsJEE Main

In a group of boys, two boys are brothers and in this group, more boys are there. In how many ways, they can sit if the brothers are not to sit alongwith each other:

Answer: (D)

Solution

The group has boys; seated in a row they can sit in ways. With the brothers together (as a block with internal orders): ways, so the

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Question ID VK-020775