Question

Calcule
Letra a...c8,2+A6,3
Letra b....p6-c10,2+c5,3

Answer 1

Boa tarde

a)

C(8,2) + A(6,3) 

8!/(2!6!) = 8*7/2 = 28

A(6,3) = 6!/(6 - 3)! = 6!/3! = 5! = 120

28 + 120 = 148 

b)

p6 - C(10,2) + C(5,3) = 6! - 10!/(2!8!) + 5!/(3!2!) 

= 120 - 45 + 10 = 130 - 45 = 85