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Proportion

Which one of ...

Question

Which one of the following is a proportion?

a) 32: 64 = 1 : 2

b) 1:2 =3:4

c) 22 : 34 = 2 : 2

d) 15: 5 = 7: 8

A

a)

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B

b)

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C

c)

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D

d)

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Solution

The correct option is A
a)

In a proportion,

Product of means = Product of extremes

Consider 32: 64 = 1 : 2 ,

Product of means = Product of extremes

=> $64 \times 1 = 32 \times 2$

=> 64 = 64

So, answer is 32: 64 = 1 : 2

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