in how many ways a grandfather along with two of his grandsons & 4 grand daughters is seated in line for a photograph, grandfather in middle always and the two grandsons never together

Dear Aadithya,

please find the attachment below answer is 6 * 4 !

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jitender

It can be solved by total ways osf arranging -ways when 2 grandsons are together                                                                                                                                                                                                                                                              total ways =6!

ways when 2 brother are together=5!*2!

so total ways =6!-5!*2!