Rationale: Sum of 10 even numbers = 10 * 11 = 110
Average = 110/10 = 11
The answer: (D)
Question: The average of first 10 even numbers is?
Options:
(A) 226
(B) 27
(C) 27
(D) 11
(E) 99
Reasoning: Assume the price = 100
Price during sale = 88
Price after sale = 100
Percent increase = 12/88*100 = 14% approx.
Ans: (D)
Question: During a sale, the price of a pair of shoes is marked down 12% from the regular price. After the sale ends, the price goes back to the original price. What is the percent of increase to the nearest percent from the sale price back to the regular price for the shoes?
Options:
(A) 9%
(B) 10%
(C) 11%
(D) 14%
(E) 90%
Rationale: In this series, each number is repeated, then 7 is subtracted to arrive at the next number.
The answer: (D)
Question: Look at this series: 53, 53, 46, 46, 39, 39, ... What number should come next?
Options:
(A) A) 12
(B) B) 14
(C) C) 27
(D) D) 32
(E) E) 86
Reasoning: (900*3*3)/100 = 81
920 + 81 = 1001
Ans: (B)
Question: Rs.900 amounts to Rs.920 in 3 years at simple interest. If the interest is increased by 3%, it would amount to how much?
Options:
(A) Rs.1056
(B) Rs.1001
(C) Rs.2056
(D) Rs.1026
(E) Rs.1856
Rationale: Number of ways = 61/21 6X5X4X3X2X1 - 360
The answer: (E)
Question: In how many different ways can the letters of the word 'PREPTY' be arranged?
Options:
(A) 160
(B) 190
(C) 210
(D) 368
(E) 360
Rationale: P(B|A) = P(A B)/P(A)
P(B|A) = (16/15)/(8/15) = 2.
The answer: (D)
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