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16 Sep 2014, 00:46
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In a collection of letters, 60 were identified as anonymous and typewritten. If 15 percent of the typewritten letters were anonymous, how many typewritten letters were not anonymous?
A. 120
B. 180
C. 340
D. 360
E. 400
A. 120
B. 180
C. 340
D. 360
E. 400
16 Sep 2014, 00:46
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Bookmarks
Official Solution:
In a collection of letters, 60 were identified as anonymous and typewritten. If 15 percent of the typewritten letters were anonymous, how many typewritten letters were not anonymous?
A. 120
B. 180
C. 340
D. 360
E. 400
Since 15 percent of typewritten letters are anonymous, and there are 60 such letters, there are a total of \(\frac{60}{0.15} = 400\) typewritten letters. Of these 400 letters, 60 are anonymous. Therefore, \(400 - 60 = 340\) letters are typewritten but not anonymous.
Answer: C
In a collection of letters, 60 were identified as anonymous and typewritten. If 15 percent of the typewritten letters were anonymous, how many typewritten letters were not anonymous?
A. 120
B. 180
C. 340
D. 360
E. 400
Since 15 percent of typewritten letters are anonymous, and there are 60 such letters, there are a total of \(\frac{60}{0.15} = 400\) typewritten letters. Of these 400 letters, 60 are anonymous. Therefore, \(400 - 60 = 340\) letters are typewritten but not anonymous.
Answer: C
02 Aug 2016, 07:09
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Given 1: 60 were both anonymous and typewritten
Given 2: 15%(Typewritten) were Anonymous
How many typewritten letters are anonymous = 60 (its just rephrase of above Given 1 statement in question)
0.15(t) = 60 (from Given statement 2)
t = 400
Only Anonymous letters = Total Typewritten - Both Typewritten AND Anonymous
= 400 - 60
= 340
Answer: C
Given 2: 15%(Typewritten) were Anonymous
How many typewritten letters are anonymous = 60 (its just rephrase of above Given 1 statement in question)
0.15(t) = 60 (from Given statement 2)
t = 400
Only Anonymous letters = Total Typewritten - Both Typewritten AND Anonymous
= 400 - 60
= 340
Answer: C
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