Question

James has 5 friends who are available to go with him to a baseball game, but he only has 2 extra tickets. How many different choices does James have for which 2 friends to invite?

A.) 3 B.) 5 C.) 10 D) 15

Answer 1

this problem belongs to combinations

formula for this problem is $nCr$

n represents number of friends and r represents number of tickets

$5C3=5*4*3/1*2*3=10$

so he can make 10 choices