allery50 ਦੀ ਇੱਕ ਕਲਾਸ ਵਿੱਚ, 30 ਗਣਿਤ ਪੜ੍ਹਦੇ ਹਨ, 25 ਵਿਗਿਆਨ ਪੜ੍ਹਦੇ ਹਨ ਅਤੇ 15 ਦੋਵੇਂ ਪੜ੍ਹਦੇ ਹਨ। ਕਿੰਨੇ ਇੱਕ ਵੀ ਨਹੀਂ ਪੜ੍ਹਦੇ?
A5
B12
C10
D8
Answer & Solution
Correct answer: C. 10
ਯੂਨੀਅਨ = 30 + 25 - 15 = 40 ਵਿਦਿਆਰਥੀ, ਇਸ ਲਈ 50 - 40 = 10 ਦੋਵਾਂ ਵਿੱਚੋਂ ਕੋਈ ਵੀ ਨਹੀਂ ਪੜ੍ਹਦਾ।
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