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pushpitkc
In a group of 150, everybody plays Soccer or Hockey. If 80 play Socker and 100 play Hockey, how many members in the group play exactly one of the two sports?

A. 30
B. 50
C. 70
D. 120
E. 130

Source: Experts Global

Given:
1. In a group of 150, everybody plays Soccer or Hockey.
2. 80 play Socker and 100 play Hockey

Asked: How many members in the group play exactly one of the two sports?

Attachment:
Screenshot 2020-04-29 at 9.51.37 AM.png
Screenshot 2020-04-29 at 9.51.37 AM.png [ 57.54 KiB | Viewed 2943 times ]

Total = Soccer + Hockey - Both + Neither
150 = 80 + 100 - Both + 0
Both = 30

Number of members in the group play exactly one of the two sports = Soccer + Hockey - 2*Both = 50 + 70 = 80 + 100 - 2*30 = 120

IMO D
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