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Three times a number is 200% increase in the number, then one-third of the same number is 200% decrease in the number.

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Question

Three times a number is 200% increase in the number, then one-third of the same number is 200% decrease in the number.

Options

  • True

  • False

MCQ
True or False
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Solution

This statement is False.

Explanation:

Let x be the number.

So, three times of x = 3x

Difference between 3x and x = 3x – x = 2x

∴ Difference between 3x and x = 3x – x = 2x

∴ Percentage increase in `x = (2x)/x xx 100 = 200%`

If one-third of `x = 1/3 x`

∴ Difference between `x` and `x/3 = x - x/3 = (2x)/3`

∴ Percentage decrease = `((2x)/3)/x xx 100`

= `2/3 xx 100`

= 66.66%

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Chapter 9: Comparing Quantities - Exercise [Page 292]

APPEARS IN

NCERT Exemplar Mathematics [English] Class 8
Chapter 9 Comparing Quantities
Exercise | Q 52. | Page 292

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