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10 May 2017, 02:25
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Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
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Question Stats:
84% (00:44) correct
16%
(00:41)
wrong
based on 99
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A group of 7 boys are playing a game, 3 of the boys averaged scores of x points. The other 4 boys averaged scores of y points. Which of the following represents the average (arithmetic mean) score of all the boys?
A. 7/(3x + 4y)
B. (x + y)/7
C. (3x + 4y)/(7xy)
D. (3x + 4y)/7
E. 7x/(x + y)
A. 7/(3x + 4y)
B. (x + y)/7
C. (3x + 4y)/(7xy)
D. (3x + 4y)/7
E. 7x/(x + y)
10 May 2017, 03:29
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Total points of 1st group: 3x
Total points of 2nd group: 4y
Combined value of points: 3x+4y
Now, Average= Total value/Total candidates i.e \(\frac{(3x+4y)}{7}\)
Hence, Option D should be the correct answer.
Total points of 2nd group: 4y
Combined value of points: 3x+4y
Now, Average= Total value/Total candidates i.e \(\frac{(3x+4y)}{7}\)
Hence, Option D should be the correct answer.
