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What is the difference in the % of the score of Prajval if his marks in Maths increase by 12.5% and marks in science decreased by 14.29%?1). 0.25%2). 25%3). 0.4%4). 40% |
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Answer» WITHOUT any change in score, Total score of PRAJVAL = 88 + 91 + 71 + 85 + 86 = 421 % score of Prajval = (421/500) × 100 = 84.2% CHANGING in score, Updated score of Math = Current score + 12.5% of current score = 88 + (1/8) × 88 = 88 + 11 = 99 Updated score of Science = current score – 14.29% of current score = 91 – (1/7) × 91 = 91 – 13 = 78 Total score of Prajval after changing = 99 + 78 + 71 + 85 + 86 = 419 ⇒ % score of Prajval after change = (419/500) × 100 = 83.8% ∴ Difference in % = 84.2 – 83.8 = 0.4% |
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