Reasoning: {Total} = {finance} + {marketing} - {both} + {neither}
100 = 25 + 54 - {both} + 40
{both} = 19%.
Ans: (D)
Question: Walking across campus, a student interviewed a group of students. 25% of the students took a finance class last semester, 54% took a marketing class last semester, and 40% took neither a finance nor a marketing class last semester. What percent of the students in the group took both a finance and a marketing class?
Options:
(A) 60%
(B) 50%
(C) 25%
(D) 19%
(E) 10%
Rationale: ? = 285 + 1895 655 545 or, ? = 980
The answer: (C)
Question: What approximate value should come in place of question mark (?) in the following equation
287.532 + 1894.029 657.48 = 543.095 + ?
Options:
(A) 870
(B) 790
(C) 980
(D) 770
(E) 890
Reasoning: Mother has a fixed place and father, so there are 3*2 ways to arrange the children, hence
Ans: (C)
Question: A family with 1 mother, 1 father, and 2 children sit in a car with 2 front seats and 2 back seats. If the mother drives with a child in the front, and the father sits in the back center seat with the other one children on either side of him, how many seating arrangements are possible?
Options:
(A) 3
(B) 4
(C) 6
(D) 8
(E) 10
Rationale: P and Q should serve on A
The answer: (D)
Question: In case O is the only individual sewing on committee B, which among the following shouldserve on committee A?
Options:
(A) V and U
(B) V and T
(C) U and S
(D) P and Q
(E) T and U
Reasoning: 1- (2c1/4c1) = 1-1/2 = 1/2
Ans: (B)
Question: There are 4 magazines lying on a table; 2 are fashion magazines and the other 2 are sports magzines. If 1 magazines are to be selected at random from the 8 magazines, what is the probability that at least one of the fashion magazine will be selected?
Options:
(A) 1
(B) 1/2
(C) 1/4
(D) 1/6
(E) 1/8
Reasoning: Avg = [(x+1)^2 + (x-1)^2] / 2
Expanding and simplifying, (x^2 + 2x + 1 + x^2 -2x + 1 ) / 2 = x^2 + 1
Ans: (B)
Question: Which of the following is equal to the average (arithmetic mean) of (x+1)^2 and (x-1)^2?
Options:
(A) x^2
(B) x^2+1
(C) x^2 +4
(D) x^2+2x
(E) x^2+4x