hard · GRE Quant
Of 80 participants, 35 are in A, 30 in B, and 28 in C. Pairwise intersections (including those in all three) are |Acap B|=12, |Acap C|=10, and |Bcap C|=8; and 4 are in all three. How many participants are in none of the three groups?
- 13
- 67
- 18
- 4
- 22
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