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1. Sohana's mathematics test had 75 problems i.e. 10 arithmetic, 30 algebra and 35 geometry problems each carrying I mark She answered 70% of the arithmetic, 40% of the algebra and 60% of the geometry problems correctly. She did not pass the test as she got less than 60% marks. How many more questions she would have needed to answer correctly to earn a 60% passing grade?
- A. 5
- B. 5
- C. 5
- D. 5
Answer: Option A
Explanation:
Total no. of problems is 75
70% of 10 are arithmetic =10070×10=7 right
40% of 30 are algebra =10040×30=12 right
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