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Question
A family of 4 brothers and 3 sisters is to be arnaged in a row for a photograph. The number of ways in which they can be seated if all the sisters are to sit together is:
A family of 4 brothers and 3 sisters is to be arnaged in a row for a photograph. The number of ways in which they can be seated if all the sisters are to sit together is:
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Solution
The correct option is C 720
Since sisters sit together consider them as one and arrange them in 3! ways
Brothers can sit anywhere, thus total number of items is 5.
Hence required number of ways is =5!.3!=720
Since sisters sit together consider them as one and arrange them in 3! ways
Brothers can sit anywhere, thus total number of items is 5.
Hence required number of ways is =5!.3!=720
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