question: If P(A) = 8/15, P(B) = 4/15, and P(A B) = 16/15 Find P(B|A)
Options:
(A) 1/2
(B) 2/3
(C) 3/2
(D) 2
(E) 4/7
answer: Stream of consciousness: P(B|A) = P(A B)/P(A)
P(B|A) = (16/15)/(8/15) = 2. The answer is (D).

q: In an office, 10 percent of the workers have at least 5 years of service, and a total of 16 workers have at least 10 years of service. If 90 percent of the workers have fewer than 10 years of service, how many of the workers have at least 5 but fewer than 10 years of service?
Options:
(A) 16
(B) 64
(C) 50
(D) 144
(E) 160
a: Stream of consciousness: (10/100)Workers = 16 = > number of workers = 160
(10/100)*Workers = x+16 = > x = 16 The answer is (A).

question: How much is 80% of 40 is greater than 4/5 of 25?
Options:
(A) 29
(B) 776
(C) 66
(D) 12
(E) 99
answer: Stream of consciousness: (80/100) * 40 (4/5) * 25
32 - 20 = 12 The answer is (D).

q: The average of 11 results is 53, if the average of first six results is 49 and that of the last six is 52. Find the sixth result?
Options:
(A) A) 46
(B) B) 23
(C) C) 66
(D) D) 76
(E) E) 74
a: Stream of consciousness: 1 to 11 = 11 * 53 = 583
1 to 6 = 6 * 49 = 294
6 to 11 = 6 * 52 = 312
6th = 294 + 312 583 = 23 The answer is (B).

question: How much more would Rs.40000 fetch, after two years, if it is put at 20% p.a. compound interest payable half yearly than if is put at 20% p.a. compound interest payable yearly?
Options:
(A) 482
(B) 725
(C) 964
(D) 837
(E) 923
answer: Stream of consciousness: 40000(11/10)4 - 40000(6/5)2 = 964 The answer is (C).

question: In order to obtain an income of Rs. 650 from 10% stock at Rs. 96, one must make an investment of:
Options:
(A) Rs. 3100
(B) Rs. 6240
(C) Rs. 6500
(D) Rs. 9600
(E) Rs. 8600
answer:
Stream of consciousness: To get Rs. 10, Investment is 96
To get Rs. 650, investment is (96/10)*650 = 6240 The answer is (B).