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Evaluate: 8C4

560
32
24
70

If you have an NCR button on your calculator type 8 NCR 4 and you get 70
The steps NCR = n! /r!(n-r)!
! means factorial 3 factorial means 3X2X1 6! means 6X5X4X3X2X1
so 8c4 = 8! /4!(8-4)! 8! = 8X7X6X5X4X3X2X1 = 40320 4!=24
8c4 = 40320 / (4! X 4!)
=40320 /( 24 X 24)
= 40320 / 576
= 70

In decimel, Hex 8 + C + 4 = 24