passpadi

2022

Mathematics

JAMB

Evaluate n2 + 1C(n+5) if n = 3

A.

55

B.

45

C.

35

D.

25

Correct Answer: 45

Explanation

32 + 1C(3+5) 9+1C3+5 10C8 = 10!/(8!2!) (10∗9∗8!)/(8!2!)= (10∗9)/2 = 45

32 + 1C(3+5) 9+1C3+5 10C8 = 10!/(8!2!) (10∗9∗8!)/(8!2!)= (10∗9)/2 = 45
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