q: Lisa's grade was 75th percentile of the 40 grades for her class. Of the 50 grades from another class, 8 were higher than Lisa's, and the rest were lower. If no other grade was the same as Lisa's grade, then Lisa's grade was what percentile of the grades of the two classes of two classes combined?
Options:
(A) 62nd
(B) 74th
(C) 80th
(D) 87th
(E) 92nd
a: Stream of consciousness: 62nd/74th/80th/87th/92nd The answer is (C).
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q: If 4 men can paint 60 m long wall in 3 days, then 5 men can paint 50 m long wall in
Options:
(A) 3days
(B) 2days
(C) 5days
(D) 6days
(E) 1day
a: Stream of consciousness: The length of wall painted by one man in one day = 60 / 4 3 = 5 m
No. of days required to paint 50 m wall by 5 men = 50/ 5 5 = 2 day. The answer is (B).
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q: A pipe can fill a cistern in 20 minutes whereas the cistern when fill can be emptied by a leak in 30 minutes. When both pipes are opened, find when the cistern will be full?
Options:
(A) 17 minutes
(B) 87 minutes
(C) 60 minutes
(D) 27 minutes
(E) 11 minutes
a:
Stream of consciousness: 1/20 - 1/30 = 1/60
60 minutes The answer is (C).
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