Two numbers are respectively $20 %$ and $50 %$ more than the third number. What $%$ is the first number of the second?

40 %

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50 %

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80 %

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70 %

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Solution

The correct option is B $80 %$
Let the third number is $x$ .
Then, First number = $x$ +0.2 $x$ = 1.2 $x$
Second number = $x$ + 0.5 $x$ = 1.5 $x$
Percentage of Second number which is equal to First
$= \frac{1.2 x}{1.5 x} \times 100 = 80$
So, correct answer is option C.

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