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Given: At a certain reception, punch is served in glasses of two sizes, small and large.
Asked: If a bowl of a certain size, when filled with punch will 24 small glasses or 15 large glasses, then 10 such bowls, when filled with punch, will fill 72 small glasses and how many large glasses?

I bowl will filll punch in = 24 small glasses = 15 large glasses
10 bowls will fill punch in = 240 small glasses = 150 large glasses

72 small glasses = 45 large glasses

10 bowls will fill punch in 72 small glasses and (150-45=105) large glasses.

IMO B
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Simple Logical Approach

Bowls can either fit 24 small (x) or 15 large (y). There are 10 bowls, so x+y=10.

STEM says some of these 10 bowls fit 72 small glasses.

72 small glasses / 24 small glasses (which is the capacity per bowl x) = 3. You are now left with 7 bowls since --> 3+y=10 ---> y=7.

7 bowls * 15 large glasses = 105 large glasses.

Voila.
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The question wants us to find the no of large glasses required to fill 10 bowls in addition to 72 small glasses

24 small glasses will fill 1 bowl
x small glasses will fill 10 bowls

x = 240, so 240 small glasses will fill 10 bowls and we already have 72 of those

so there are (240-72)small glasses left to fill the bowl and this equals 168small glasses left

Now we need to determine how many large glasses is equal to 168 small glasses

From the question 24 small glasses = 15 large glasses
therefore 168 small glasses = x large glasses

with cross multiplication, x= 105 large glasses
Answer = B­
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sahildesai360
At a certain reception, punch is served in glasses of two sizes, small and large. If a bowl of a certain size, when filled with punch will 24 small glasses or 15 large glasses, then 10 such bowls, when filled with punch, will fill 72 small glasses and how many large glasses?

A) 90
B) 105
C) 120
D) 135
E) 150
[ltr]
[/ltr]
Given:
1B = 24S or 15L
10B = 72S + (?)L

10 B will fit 10 *15L’s that’s 150

But already 72S is present

So if 24S = 15L, then 72S = is how many L?
72*15/24 = 15*3 = 45L
>>72S = 45L

So the 10B’s are already filled with 45L’s, so how many more L’s can it be filled with?

150L - 45L = 105L’s


c'est tout!
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