allery70 लोकांच्या एका गटात, 40 जण चहा पितात, 35 जण कॉफी पितात आणि 15 जण यांपैकी काहीही पीत नाहीत. दोन्ही पिणारे किती लोक आहेत?
A10
B15
C20
D25
Answer & Solution
Correct answer: C. 20
Union = 70 - 15 = 55. दोन्ही पिणारे = 40 + 35 - 55 = 20.
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