What is the number whose $20 %$ is $30 %$ of $40$ ?

90

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80

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60

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50

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Solution

The correct option is C $60$
Let the number be $X$
$20 %$ of $X = 30 %$ of $40$
$\Rightarrow \frac{20}{100} \times X = \frac{30}{100} \times 40$
$\Rightarrow X = \frac{30 \times 40}{20} = 60$
Therefore, the number is $60$ .

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Similar questions

The marks obtained by $40$ students of a class are given below :
$80, 10, 30, 70, 60, 50, 50, 40, 40, 20, 40, 90, 50, 30, 70,$
$10, 60, 50, 20, 70, 70, 30, 80, 40, 20, 80, 90,$ $50, 80,$
$60, 70, 40, 50, 60, 90, 60, 40, 40, 60$ , and $60$

How many numbers are less than

35

Q. The marks obtained by 40 students of a class are given below :

80, 10, 30, 70, 60, 50, 50, 40, 40, 20, 40, 90, 50, 30, 70, 10, 60, 50, 20, 70, 70, 30, 80, 40, 20, 80, 90,

50, 80, 60, 70, 40, 50, 60, 90, 60, 40, 40, 60

, and

60

Construct a frequency distribution table.

Q. The marks obtained by 40 students of a class are given below :

80, 10, 30, 70, 60, 50, 50, 40, 40, 20, 40, 90, 50, 30, 70, 10, 60, 50, 20, 70, 70, 30, 80, 40, 20, 80,

90, 50, 80, 60, 70, 40, 50, 60, 90, 60, 40, 40, 60

, and

60

How many students obtained marks below

40

Q. Draw a histogram and frequency polygon to represent the following data.

Marks	$10 - 20$	$20 - 30$	$30 - 40$	$40 - 50$	$50 - 60$	$60 - 70$	$70 - 80$	$80 - 90$	$90 - 100$
No. of Students	$12$	$22$	$35$	$40$	$60$	$52$	$40$	$30$	$5$

Q. What is the highest power of

5

that divides

90 \times 80 \times 70 \times 60 \times 50 \times 40 \times 30 \times 20 \times 10

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What is the number whose 20% is 30% of 40?

The correct option is C 60Let the number be X20% of X=30% of 40⇒20100×X=30100×40⇒X=30×4020=60Therefore, the number is 60.

What is the number whose $20 %$ is $30 %$ of $40$ ?

The correct option is C $60$
Let the number be $X$
$20 %$ of $X = 30 %$ of $40$
$\Rightarrow \frac{20}{100} \times X = \frac{30}{100} \times 40$
$\Rightarrow X = \frac{30 \times 40}{20} = 60$
Therefore, the number is $60$ .