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Vincen
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Your Answer
A
B
C
D
E
Global Stats
A pair is a group of 2 people. In how many ways can we choose two pairs out of 5 people with replacement, such that both the pair contain different persons?
A. 3
B. 4
C. 10
D. 15
E. 30
Answer: D
Source: Economist
A. 3
B. 4
C. 10
D. 15
E. 30
Answer: D
Source: Economist
