Question
Mohini's Biology test had 250 questions i.e., 20
Macromolecules, 60 Homeostasis and 70 Immunology questions. Although she answered 70% of the Macromolecules, 40% of the Homeostasis and 60% of the Immunology questions correctly, but did not pass the test. How many more question she would have needed to answer correctly to earn a 60% passing grade?Solution
Number of questions attempted correctly = (70% of 20 + 40% of 60 + 60% of 70) ⇒ (14 + 24 + 42) = 80. Questions to be answered correctly for 60% grade= 60% of 250 = 150 So, Required number of questions= (150 – 80) = 70
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)
99.99% of 9.99 + 299.98% of 129.98 = ?2Â
456.9 + 328.10 - 122.98 = ? + 232.11
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)
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