Question

resolva as combinações simples :
C 8.2
C 6.2
C 4.2
C 2.2

Answer 1

C 8,2 = (8x7)/(2x1) = 56/2 = 28
C 6,2 = (6x5)/(2x1) = 30/2 = 15
C 4,2 = (4x3)/(2x1) = 12/2 = 6
C 2,2 = (2,2)/(2x1) = 4/2 = 2