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# Ann wants to make cookies

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Joined: 13 Aug 2016
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Ann wants to make cookies,but she has only two eggs and the recipe calls for 3.If the recipe calls for three cups of flour,1 cup of sugar,and 1/2 cup of butter,how many cups of butter does she need to use if she wants to keep the ratios of the ingredients consistent with the original recipe,but using only two eggs?

[Reveal] Spoiler: OA
1/3

Last edited by Carcass on 29 Aug 2016, 02:23, edited 1 time in total.
Edited by Carcass
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Expert's post
Here we know that for cookies we need 3 eggs and 0.5 cups of butter.

The ratio of eggs to butter = $$\frac{3}{0.5}$$.

Now she has 2 eggs and let the cups of butter required be x.

For ratio of eggs to butter to be same we know that.

$$\frac{3}{0.5}$$=$$\frac{2}{x}$$.

Hence $$x=\frac{1}{3}$$.
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Expert's post
yasir9909 wrote:
Ann wants to make cookies,but she has only two eggs and the recipe calls for 3.If the recipe calls for three cups of flour,1 cup of sugar,and 1/2 cup of butter,how many cups of butter does she need to use if she wants to keep the ratios of the ingredients consistent with the original recipe,but using only two eggs?

[Reveal] Spoiler: OA
1/3

We can solve the question by using equivalent ratios

We're comparing eggs to butter (and flour and sugar, but that information isn't needed)

We require 3 eggs for every 0.5 cups of butter.

We have 2 eggs and we need to determine the amount of butter

Let x = the number of cups of butter needed with 2 eggs

We get: 3/0.5 = 2/x
Cross multiply to get: (3)(x) = (0.5)(2)
Simplify: 3x = 1
Solve: x = 1/3

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