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A sports team of 11 students is to be co...

A sports team of 11 students is to be constituted, choosing alteast 5 from class XI and atleast 5 from class XII. If there are 20 students in each of these classes, in how many ways can the team be constituted ?

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The correct Answer is:
`= 2{(""_20P_5}/{5!)}{(""_20P_6}/{6!)}`
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