The average of 10 numbers is calculated as 15. It is discovered later on that while calculating the average, one number namely 36 was wrongly read as 26. The correct average is?
Options:
(A) 22
(B) 88
(C) 16
(D) 83
(E) 82
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10 * 15 + 36 26 = 160/10 = 16 So the answer is: (C).
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A train 540 meters long is running with a speed of 54 kmph. The time taken by it to cross a tunnel 180 meters long is?
Options:
(A) 17 sec
(B) 14 sec
(C) 48 sec
(D) 87 sec
(E) 25 sec
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D = 540 + 180 = 720
S = 54 * 5/18 = 15 mps
T = 720/15 = 48 se So the answer is: (C).
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Look at this series: 53, 53, 41, 41, 29, 29, ... What number should come next?
Options:
(A) A) 12
(B) B) 14
(C) C) 27
(D) D) 53
(E) E) 17
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In this series, each number is repeated, then 12 is subtracted to arrive at the next number. So the answer is: (E).
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