Double check my answer? ?
lidia is packing her suitcase in the dark, so as to not wake her little sister. she blindly chooses 3 of her 5 sweaters. what is the probability that she chooses her 3 favorite sweaters?
option a: 1/10
option b: 1/15
option c: 1/60
option d: 1/75

The sample space of choosing 3 sweaters from the 5 sweaters in the suitcase is 5C3 or "combination of 5 taken 3" which is equal to 10. If she has 3 favorites from them, the ways she could choose the 3 is equal to 3C3 which is equal to 1. The probability is equal to 1/10. 

Function:(7,-4), (0,9), (2,-2)
(-6,5),(-5,6), (8,2)
(2,3),(6,-5),(-1,3)
Not a function:(0,3),(0,7),(4,0)
(1,9),(-3,-2),(1,-4)