allery100 विद्यार्थ्यां मदीं 60 गणित आवडटा, 50 विज्ञान आवडटा, 40 दोनूय आवडटा. कितल्यांक फकत गणित आवडटा?
A30
B20
C40
D60
Answer & Solution
Correct answer: B. 20
फकत गणित = एकूण गणित - दोनूय = 60 - 40 = 20.
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