medium · GMAT Quantitative Reasoning
A hobbyist group of 90 people collects Stamps, Coins, and Postcards. 45 collect Stamps, 40 collect Coins, and 35 collect Postcards. 20 collect both Stamps and Coins, 15 collect both Coins and Postcards, and 10 collect both Stamps and Postcards, while 5 people collect all three.
How many people collect only Postcards?
- 25
- 15
- 20
- 5
- 10
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