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14 Mar 2019, 23:47
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D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
45%
(medium)
Question Stats:
69% (02:18) correct
31%
(02:17)
wrong
based on 294
sessions
History
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Not Attempted Yet
TOUGH QUESTION:
Sarah pours four ounces of coffee into an eight-ounce cup and four ounces of cream into a second cup of the same size. She then transfers half the coffee from the first cup to the second and, after stirring thoroughly, transfers half the liquid in the second cup back to the first. What fraction of the liquid in the first cup is now cream?
(A) 1/4
(B) 1/3
(C) 3/8
(D) 2/5
(E) 1/2
15 Mar 2019, 04:38
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Bunuel
Please find the solution as attached.
Answer: Option D
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16 Mar 2019, 04:01
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Bunuel
CUP 1 = 4 OUNCES COFFEE
CUP2= 4 OUNCES CREAM
NOW
POURING 2 OUNCES COFFEE TO CUP2 ;
CUP 2 HAS ; 2 OUNCES COFFEE + 4 OUNCES CREAM
AFTER STIRRING
HALF VOLUME OF CUP 2 IS POURED TO CUP 1
WE ARE SUPPOSSING THAT MIXTURE IS EVENLY DISTRIBUTED UPON STIRRING
SO COFFEE POURED TO CUP 1 IS HALF OD 2 OUNCES ; 1 OUNCE
AND CREAM ; 4 OUNCE HALF = 2 OUNCE
SO NOW
CUP 1 HAS TOTAL 3 OUNCE COFFEE AND 2 OUNCE CREAM
OR SAY
FRACTION OF CREAM IN CUP 1 2/5
IMO D
