If the ratio of 6 cookies to 2 glasses of milk is equivalent to the ratio of 12 cookies to a specific number of glasses of milk, then the number of glasses is.
4
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Solution
The correct option is A 4 Ratio of 6 cookies to 2 glasses of milk =6:2=62
Let n be the number of glasses of milk. ⇒ Ratio of 12 cookies to n glasses of milk 12n=12:n
The two ratios are equivalent ⇒62=12n
By cross multiplication ⇒6n=12×2 ⇒n=4