Question

1-Calcule a) C5.3 b)C7.5 c)C6,2 d)C 10,3/C5,3

Answer 1

Resposta:

C5,3 = 5!/3!(5-3)!

= 5*4*3!/3! 2!

= 5*4/2!

= 20/2

= 10

C7,5 = 7!/5!(7-5)!

= 7*6*5!/5! 2!

= 7*6/2!

= 42/2

= 21

C6,2 = 6!/2!(6-2)!

= 6*5*4!/2! 4!

= 6*5/2

= 30

C10,3 = 10!/3!(10-3)!

= 10*9*8*7!/3! 7!

= 10*9*8/3*2*1

= 720/6

= 120

C5,3 = 5!/3!(5-3)!

= 5*4*3!/3! 2!

=20/2

= 10

120/10 = 12

Explicação passo-a-passo:

Espero ter ajudado!!!