hi1010101 hi1010101

26-04-2017
Mathematics

contestada

How many combinations of 3 students can a teacher choose from 32 students?

A.
96

B.
4960

C.
29,760

D.
32,768

Respuesta :

JonHenderson55 JonHenderson55

26-04-2017

The answer is: [B]: "4960" .
_____________________________________________
Explanation:
_____________________________________________
32C3 = [(32!)] / [ 3! *(32-3)! ] ;

= [(32!)] / [ 3! *(29!) ]

= (32*31*30) / (1*2*3) = 29760 / 6 = 4960 .
_________________________________________________

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