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Engineering Exams RRB-JE JE (Junior Engineer) CMA (Chemical and Metallurgical Assistant) DMS (Depot Material Superintendent) CS (Chemical Supervisor - Research) MS (Metallurgical Supervisor - Research) Mathematics 2019 24.05.2019 Paper-1 Shift-1 Easy +1 -0.33
Simplify:
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Correct Answer: A. 5/16
Explanation: To find the value of b% of 20 when 20% of a = b, you can follow these steps:1. Express the first statement mathematically: b = (20/100) \* a, which simplifies to b = 0.2a. 2. Substitute this value of b into the second expression: b% of 20 = (b/100) \* 20. 3. Replace b with 0.2a: (0.2a / 100) \* 20. 4. Simplify the calculation: 0.2a \* (20/100) = 0.2a \* 0.2 = 0.04a. 5. Convert 0.04a back into a percentage: 0.04 \* 100 = 4%.Therefore, b% of 20 is equal to 4% of a.
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