allery48 ਵਿਦਿਆਰਥੀਆਂ ਵਿੱਚ, ਲੜਕਿਆਂ ਦੇ ਔਸਤ 64, ਕੁੜੀਆਂ 76, ਸਾਰੇ 69 ਅੰਕ। ਕੁੜੀਆਂ ਦੀ ਗਿਣਤੀ?
A28
B18
C16
D20
Answer & Solution
Correct answer: D. 20
ਜੇਕਰ g ਕੁੜੀਆਂ ਦੀ ਸੰਖਿਆ ਹੈ, 64(48 − g) + 76g = 69 × 48 ਦਿੰਦਾ ਹੈ g = 20।
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