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# An Ice-cream parlor buys milk-cream cartons, each containing 21/2 cups

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Math Expert
Joined: 02 Sep 2009
Posts: 55271

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27 Sep 2018, 05:27
00:00

Difficulty:

45% (medium)

Question Stats:

61% (01:31) correct 39% (01:50) wrong based on 23 sessions

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An Ice-cream parlor buys milk-cream cartons, each containing 5/2 cups of milk-cream. If the restaurant uses 1/2 cup of the milk-cream in each serving of its ice-cream, what is the least number of cartons needed to prepare 98 servings of the ice-cream?

(A) 9
(B) 19
(C) 20
(D) 21
(E) 24

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Joined: 19 Oct 2013
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Re: An Ice-cream parlor buys milk-cream cartons, each containing 21/2 cups  [#permalink]

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27 Sep 2018, 06:31
Each carton contains 5/2 cups
Each serving uses 1/2 cup so from 1 carton the restaurant can make 5 servings.

Try 5*9 = 45 not enough
Try 5*19 = 95 not enough

Try 20*5 = 100, enough.

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Joined: 15 Nov 2017
Posts: 54

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21 Feb 2019, 08:57
(5/2)x = (98/2) = 19.6 ≈ 20

x = least number of cartons needed
(5/2) = size of each carton of milk-cream
98 = servings of ice cream
1/2 = amount of milk-cream per ice cream serving

Is this approach okay? I am happy to edit if needed.

Thanks!

Bunuel wrote:
An Ice-cream parlor buys milk-cream cartons, each containing 5/2 cups of milk-cream. If the restaurant uses 1/2 cup of the milk-cream in each serving of its ice-cream, what is the least number of cartons needed to prepare 98 servings of the ice-cream?

(A) 9
(B) 19
(C) 20
(D) 21
(E) 24
An Ice-cream parlor buys milk-cream cartons, each containing 21/2 cups   [#permalink] 21 Feb 2019, 08:57
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