two equal glasses are respectively 1 3 and 4 full of milk..., Ratio & Proportion, General Mathematics

Question:Two equal glasses are respectively `1/3` and `1/4` full of milk. They are then filled with water and the contents mixed in a tumbler. The ratio of milk and water in the tumbler is :

A `7 : 5` 
B `7 : 17` 
C `9 : 21` 
D `11 : 23`

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+ AnswerB

+ ExplanationFirst glass contains Milk `= 1/3`, Water `= 2/3`.

Second glass contains Milk `= 1/4`,Water `= 3/4`.

New tumbler contains :

Milk `= (1/3 + 1/4) = 7/(12)`,

Water `= (2/3 + 3/4) = (17)/(12)`.

`:.` Ratio of Milk & Water `= 7/(12) : (17)/(12)`.

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