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x-1-x-2-x-3-5-ways-5-1C-3-1-4C-2-6-




Question Number 21813 by lakshmi.narasimhan last updated on 04/Oct/17
x_1 +x_2 +x_3 =5  ways=5−1C_(3−1) =4C_2 =6
x1+x2+x3=5ways=51C31=4C2=6

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