1.

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%

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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