Subject
Quantitative Aptitude
Topic
Average
If the average of 11, 17, x and y is 19, what is the average of (x+5) and (y-7)?
If the average of 11, 17, x and y is 19, what is the average of (x+5) and (y-7)?
ক)
46খ)
23গ)
21ঘ)
14Explanation
(11 + 17 + x + y)/4 = 19 or, (11 + 17 + x + y) = 19*4 = 76 or, x + y = 76 - 11 - 17 or, x + y = 48 Now, [(x+5) + (y-7)]/2 = (x+5+y-7)/2 = [(x+y) -2]/2 = (48 -2)/2 = 46/2 = 23Related questions
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