hard · GRE Quant
In a corporate wellness survey, 26 employees are enrolled in the solar-commute incentive program, one of three overlapping programs (solar-commute, bike-share, telehealth). Pairwise enrollment counts (each including employees enrolled in all three programs) show 8 employees in both solar-commute and bike-share, and 7 in both solar-commute and telehealth. Exactly 15 employees are enrolled in solar-commute ONLY (not in either other program). How many employees are enrolled in all three programs?
- 19
- 15
- 8
- 11
- 4
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