alleryIn a village survey, 70 people grow paddy, 50 grow wheat, and 20 grow both. How many grow at LEAST one of the two?
A$120$
B$100$
C$140$
D$50$
Answer & Solution
Correct answer: B. $100$
|paddy ∪ wheat| = |paddy| + |wheat| − |paddy ∩ wheat| = 70 + 50 − 20 = 100.
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