Question 437285
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Hi
A student must choose 3 questions out of 5 on a math test: 
5C3 = 10 ways of choosing 3 out of the 5 questions
P(choosing 1st 2) = 3/10
Sample Space
 1,2,3
 1,2,4
 1,2,5
 1,3,4
 1,3,5
 1,4,5
 2,3,4
 2,3,5
 4,2,5
 5,3,4