allery100 ਵਿਦਿਆਰਥੀਆਂ ਵਿੱਚੋਂ, 60 ਨੂੰ ਗਣਿਤ ਪਸੰਦ ਹੈ, 50 ਨੂੰ ਵਿਗਿਆਨ ਪਸੰਦ ਹੈ, 40 ਨੂੰ ਦੋਵੇਂ ਪਸੰਦ ਹਨ। ਕਿੰਨੇ ਕੁ ਸਿਰਫ਼ ਗਣਿਤ ਪਸੰਦ ਕਰਦੇ ਹਨ?
A30
B20
C40
D60
Answer & Solution
Correct answer: B. 20
ਸਿਰਫ਼ ਗਣਿਤ = ਕੁੱਲ ਗਣਿਤ - ਦੋਵੇਂ = 60 - 40 = 20।
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