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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) 2019 24.05.2019 Paper-1 Mathematics Shift-1 Easy +1 -0.33
Evaluate :
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Correct Answer: A. 800
Explanation: To solve this, first express the relationship between a and b as an equation: 0.20 * a = b. The question asks for the value of b% of 20, which can be written as (b / 100) * 20. By substituting the expression for b into this second equation, you get ((0.20 * a) / 100) * 20. Simplifying this leads to (0.20 * 20 / 100) * a, which equals 0.04 * a. Since 0.04 is the same as 4%, the result is 4% of a. Based on the provided options, the correct numerical value corresponding to this logic is 4, making choice D the correct answer.
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