A.30
B.15
C.45
D.none
Show AnswerAnswer=Option B
ECAT Math
The average height of a class of 25 students is 4.4 feet. A student of height 5.7 feet is newly enrolled. Find the new average______?
A.4.43 feet
B.4.45 feet
C.4.31 feet
D.4.30 feet
Show AnswerAnswer=Option B
What is the average (arithmetic mean) of the positive integers from 101 to 200 inclusive______?
A.150.5
B.155
C.145
D.160.5
E.140.2
Show AnswerAnswer=Option A
Let X be the median and Y the mode of the following set of numbers: 15 60 30 40 60 90. What is the average (arithmetic mean) of X and Y______?
A.55
B.50
C.60
D.62.5
E.65
Show AnswerAnswer=Option A
The average weight of a group of boys and girls is 37.5 kg. The average weight of the boys is 40 kg and that of girls is 35 kg. If the number of boys is 25 find the number of girls______?
A.12
B.25
C.28
D.21
Show AnswerAnswer=Option B
The average age of a class of 40 boys is 11.95 years. The average of the class is raised to 12 years by the coming of a new boy. How old is this new boy______?
A.7 years
B.9 years
C.16 years
D.14 years
Show AnswerAnswer=Option D
The average age of a class of 60 boys which is 11.9 years is raised to 12 years by coming of a new boy the age of the new boy is______?
A.27 years
B.23 years
C.18 years
D.17 years
Show AnswerAnswer=Option C
The average expenditure of a man for the first 7 months is Rs. 130 and for the next 5 months is Rs. 140. He withdraws a sum of Rs.110 from his bank. His average monthly earning is______?
A.Rs. 125
B.Rs. 145
C.Rs. 155
D.Rs. 120
Show AnswerAnswer=Option A
The average weight of 20 students in a class is decreased by 500 grams when one of the students who weights 40 kg is replaced by a new boy. The weight of the new boy is______?
A.35 kg
B.40 kg
C.30 kg
D.50 kg
Show AnswerAnswer=Option C
The average age of 6 men is increased by 3 years when two of them whose ages are 25 and 27 years are replaced by two men. The average age of two newcomers is______?
A.25 years
B.32 years
C.30 years
D.35 years
Show AnswerAnswer=Option D