q: The speed of a boat in still water is 60kmph and the speed of the current is 40kmph. Find the speed downstream and upstream?
Options:
(A) kmph
(B) kmph
(C) kmph
(D) kmph
(E) kmph
a: Stream of consciousness: Speed downstream = 60 +40 = 100 kmph
Speed upstream = 60 - 40 = 20 kmph The answer is (D).
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q: What is the probability that Company Q's advertisement will be one of the first two be shown during the first commercial break?
Options:
(A) 1/ 225
(B) 1 / 30
(C) 1 /15
(D) 2 / 15
(E) 4 /15
a: Stream of consciousness: Q 1/15 + (14/15) * 1/14 = 2/15 The answer is (D).
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q: The average age of a family of 6 members is 40 years.If the age of the youngest member is 7 years,what was the average age of the family at the birth of the youngest member?
Options:
(A) 33
(B) 18
(C) 21
(D) 12
(E) 19
a:
Stream of consciousness: Present age of total members = 6 X 40 = 240
7 yrs back their ages were = 6 x 7 = 42
Ages at the birth of youngest member = 240 - 42 = 198
Therefore, avg age at the birth of youngest member = 198/6 = 33. The answer is (A).
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