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The number of ordered quadruples (a1,a2,...

The number of ordered quadruples `(a_1,a_2,a_3,a_4)` of positive odd integers that satisfy `a_1+a_2+a_3+a_4=32` is equal to `(a)31 C_3` (b) `17 C_3` (c)4495 (d) `(17C_3)-(17C_4)`

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