(Ans). (C)
(Question). The sale price shirts listed for Rs.400 after successive discount is 10% and 5% is?
Options:
(A) 280
(B) 290
(C) 342
(D) 250
(E) 253
(CoT). 400*(90/100)*(95/100) = 342

(Ans). (C)
(Question). 10 books are placed at random in a shelf. The probability that a pair of books will always be together is ?
Options:
(A) 1/9
(B) 1/6
(C) 1/5
(D) 1/0
(E) 1/1
(CoT). 10 books can be rearranged in 10! ways consider the two books taken as a pair then number of favourable ways of getting these two books together is 9! 2!
Required probability = 1/5

(Ans). (C)
(Question). If 14m n = p, then which of the following represents the average (arithmetic mean) of m, n, and p, in terms of m?
Options:
(A) 2m 1
(B) 4m
(C) 5m
(D) m/5
(E) 6m/5
(CoT). 14m - n = p
Add n to both sides:
14m = n + p
Add m to both sides:
15m = n + p + m
Now, divide both sides by 3
5m = (n + p + m)/3 = the average of n, p, and m

(Ans). (C)
(Question).
The average of first 17 even numbers is?
Options:
(A) 10
(B) 11
(C) 18
(D) 20
(E) 24
(CoT). Sum of 17 even numbers = 17 * 18 = 306
Average = 306/17 = 18