Evaluate.
-C8,2
A)720
B)28
C)1440
D)4

Name: Evaluate. -C8,2 A)720 B)28 C)1440 D)4
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Question

Quizplus · Accepted Answer

C8,2 represents the number of ways to choose 2 items from a set of 8 items without regard to order. This is a combination problem that can be solved using the formula nCr = n! / r!(n-r)!, where n is the total number of items and r is the number of items being chosen. Plugging in the values, C8,2 = 8!/(2!(8-2)!) = 8!/2!6! = (8x7/2x1) = 28. Therefore, the answer is B.