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30 Oct 2019, 23:46
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A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
85% (00:49) correct
15%
(01:19)
wrong
based on 68
sessions
History
Date
Time
Result
Not Attempted Yet
Which of the following is one-third of the reciprocal of the \(\frac{1}{3} + \frac{8}{7}\) ?
A. 7/31
B. 7/15
C. 8/21
D. 21/31
E. 31/21
A. 7/31
B. 7/15
C. 8/21
D. 21/31
E. 31/21
31 Oct 2019, 00:35
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Bunuel
\(\frac{1}{3} + \frac{8}{7}\)
\(\frac{(7 + 24)}{21}\)
\(\frac{31}{21}\)
Reciprocal : \(\frac{21}{31}\)
One-third of reciprocal :
\(\frac{21}{31}*\frac{1}{3}\)
\(\frac{7}{31}\)
(A)
31 Oct 2019, 06:37
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Solution
To find
- • Value of one-third of the reciprocal of the 1/3+8/7
Approach and Working out
1/3+8/7 = (7 +24 )/21= 31/21
Reciprocal of 1/3+8/7 = 21/31
One third of Reciprocal of 1/3+8/7 = 1/3 × 21/31 = 7/31
Thus, option A is the correct answer.
Correct Answer: Option A
