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Two numbers are less than the third number by 20% and 28% respectively. By what per cent is the second number less than the first number?
  • a)
    15%
  • b)
    10%
  • c)
    2%
  • d)
    20%
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Two numbers are less than the third number by 20% and 28% respectively...
Let the third number be 100
Then the frist number = 100 – 20 = 80
Second number = 100 – 28 = 72
% with which second number is less than first = (first-second)/first × 100%
⇒ (80 - 72)/80 × 100 %
⇒ 800/80% = 10%
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Two numbers are less than the third number by 20% and 28% respectively. By what per cent is the second number less than the first number?a)15%b)10%c)2%d)20%Correct answer is option 'B'. Can you explain this answer?
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