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Bunuel
Jo's collection contains US, Indian and British stamps. If the ratio of US to Indian stamps is 5 to 2 and the ratio of Indian to British stamps is 5 to 1, what is the ratio of US to British stamps?

A. 5 : 1
B. 10 : 5
C. 15 : 2
D. 20 : 2
E. 25 : 2

US: Indian = 5:2 = 25:10
Indian: British = 5:1 = 10:2

Hence US: Indian: British = 25:10:2
US: British = 25:2

Correct Option: E
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Bunuel
Jo's collection contains US, Indian and British stamps. If the ratio of US to Indian stamps is 5 to 2 and the ratio of Indian to British stamps is 5 to 1, what is the ratio of US to British stamps?

A. 5 : 1
B. 10 : 5
C. 15 : 2
D. 20 : 2
E. 25 : 2

US:I= 5:2

I:B= 5:1

Multiply US:I by 5 and I:B by 2

US:I:B= 25:10:2

E is the answer
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Bunuel
Jo's collection contains US, Indian and British stamps. If the ratio of US to Indian stamps is 5 to 2 and the ratio of Indian to British stamps is 5 to 1, what is the ratio of US to British stamps?

A. 5 : 1
B. 10 : 5
C. 15 : 2
D. 20 : 2
E. 25 : 2

U/I = 5/2

I/B = 5/1

Since I is multiple of both 2 (as per first ratio) and 5 (as per second ratio) so let's assume that I = 10
i.e. Multiplying teh first ratio by 5 and second ration by 2 in each numerator and denominator

then, U : I : B = 25 : 10 : 2

i.e. U : B = 25 : 2

Answer: Option E
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Bunuel
Jo's collection contains US, Indian and British stamps. If the ratio of US to Indian stamps is 5 to 2 and the ratio of Indian to British stamps is 5 to 1, what is the ratio of US to British stamps?

A. 5 : 1
B. 10 : 5
C. 15 : 2
D. 20 : 2
E. 25 : 2

Ratio of US : Indian stamps = 5:2
Ratio of Indian : British stamps = 5:1

Ratio of US : Indian : British stamps = 25:10:2
Ratio of US : British stamps = 25:2

IMO E

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