. Value of expression
A. 52C4
B. 52C2
C. 52C6
D. none of these
Best Answer
Ans: A
Sol; 47C4 + 47C3 + 48C3 + 49C3 + 50C3 + 51C3
= 48C4 + 48C3 +49C3 + 50C3 + 51C3
= 49C4 + 49C3 + 50C3 + 51C3
= 50C4 + 50C3 + 51C3 = 51C4 + 51C3
= 52C4
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