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  • In a group of 8 girls , two girls are sisters. The number of ways in which the girls can sit in row so that two sisters are not sitting together is.

In a group of 8 girls , two girls are sisters. The number of ways in which the girls can sit in row so that two sisters are not sitting together is.

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Solution: The requried number of ways

=the number of ways  in which 8 girls can sit in a row \- the number of ways in which sit together

\=8!-(2)(7!)=30240

Posted by

Deependra Verma

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