Question

Mr. Anderson has 3 passenger seats in his car. He offered to drive some of the 5 members of his daughter's club to the movies. How many different groups of 3 passengers could he drive?
(a) 2
(b) 3
(c) 5
(d) 10
(e) 20

Answer 1

nCr = 5C3 = 10

5! / (3!2!) = 10
answer: 10

Answer 2

i get the first way u did it but in the second how did u get the denominator?