The mode and median of the data 8, 6, 8, 7, 8, 6, 8, 7, 6 is
(A) 7 and 8
(B) 6 and 7
(C) 8 and 7
(D) 6 and 8
The mean of four different observations is 17.5. When a new observation whose value 20 is added, what will be the new mean?
(A) 18
(B) 17.5
(C) 19
(D) 18.5
The median of the number 14, 12, 12, 16, 13 and 18 is:
(A) 13
(B) 14
(C) 14.5
(D) 13.5
The heights of Arun’s family members are given in cm’s as 165, 180, 181, 163, 172, 180, 162 The median height of the family will be
(A) 172
(B) 170
(C) 131
(D) 167
A set of data is given. The mean of the set is 35 while the median is set as 60. Find the mode of the data.
(A) 25
(B) 30
(C) 20
(D) 110
In the following frequency table, the value of H will be
(A) 10
(B) 8
(C) 7
(D) 2
The value of P + Q in the following table is-
(A) 58
(B) 40
(C) 66
(D) 60
Q : A alone would take 6 hours more to complete the job than if both A and B would work together. When B worked alone he took 1.5 hours more to complete the job and A and B worked together. How much time they will take if they if they work together?
(A) 3 hours
(B) 4 hours
(C) 4.5 hours
(D) 5 hours
(E) None of these
Gopal and Ravi contracted a work for Rs 480. If Gopal can do that work in 15 days and Ravi can complete that same work in 10 days. He completed this work with Mahesh in 5 days, then tell me how much money Mahesh got.
(A) Rs.80
(B) Rs.120
(C) Rs.160
(D) Rs. 40
If efficiency of B increased by
(A) 36 days
(B) 48 days
(C) 32 days
(D) 28 days
(E) 30 days
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