allery80 ਲੋਕਾਂ ਦੇ ਇੱਕ ਸਰਵੇਖਣ ਵਿੱਚ, 45 ਚਾਹ ਪੀਂਦੇ ਹਨ, 35 ਕੌਫੀ ਪੀਂਦੇ ਹਨ, ਅਤੇ 10 ਦੋਵੇਂ ਪੀਂਦੇ ਹਨ। ਕਿੰਨੇ ਲੋਕ ਸਿਰਫ਼ ਕੌਫੀ ਪੀਂਦੇ ਹਨ?
A15
B20
C25
D35
Answer & Solution
Correct answer: C. 25
ਸਿਰਫ਼ ਕੌਫੀ = n(ਕੌਫੀ) - n(ਚਾਹ ∩ ਕੌਫੀ) = 35 - 10 = 25।
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