Exams › IBPS PO › Quantitative Aptitude

Richa answered 70% of 10 questions in A, 50% of 30 questions in B, and 60% of 45 questions in C. She needs 60% overall. How many more correct answers are needed?

1. 4
2. 2
3. 5
4. 6

Correct answer: 2

Solution

She answered $70\%$ of 10 = 7, $50\%$ of 30 = 15, and $60\%$ of 45 = 27. Total correct = 49 out of 85. To get 60%, she needs $0.6\times 85=51$ correct answers, so she needs 2 more.

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