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2.) Of a classroom filled with 20 students, 2 will be selected to stay after school and correct homework for extra credit. How many combinations are possible? A.) 190 B.) 210 C.) 63 D.) 40
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28 votes
28 votes
2.) Of a classroom filled with 20 students, 2 will be selected to stay after school and correct

homework for extra credit. How many combinations are possible?
A.) 190
B.) 210
C.) 63
D.) 40

User Rick Regan
by
2.9k points

1 Answer

27 votes
27 votes

Answer:

190

Explanation:

20C2 = (20*19)/(1*2) = 190

User Hammerfest
by
3.2k points
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