If P(A) = 2/15, P(B) = 4/15, and P(A B) = 12/15 Find P(B|A)
Options:
(A) 1/2
(B) 2/3
(C) 3/2
(D) 4/5
(E) 6
--
P(B|A) = P(A B)/P(A)
P(B|A) = (12/15)/(2/15) = 6. So the answer is: (E).
-----
A 360 meter long train crosses a man standing on the platform in 6 sec. What is the speed of the train?
Options:
(A) 229
(B) 108
(C) 278
(D) 216
(E) 112
--
S = 360/6 * 18/5 = 216 kmph So the answer is: (D).
-----
A train 124 m long running at 68 kmph crosses a platform in 19 sec. What is the length of the platform?
Options:
(A) 338
(B) 234
(C) 240
(D) 881
(E) 271
--
D = 68 * 5/18 = 19 = 358 124 = 234 So the answer is: (B).
-----