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In how many ways three girls and nine bo...

In how many ways three girls and nine boys can be seated in two vans, each having numbered seats, 3 in the front and 4 at the back? How many seating arrangements are possible if 3 girls sit together in a back row on adjacent seats?

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The correct Answer is:
`"^(14)P_(12)2(2xx3!)^(11)P_(9)`
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