Assumed Mean Method of Finding Mean
Trending Questions
Q.
Calculate the mean of the following data : Class Frequency
Q. Find the mean marks per student, using Step Deviation method method:
Marks51525354555Number of students12182720176
Marks51525354555Number of students12182720176
Q. There are several human beings and several dogs in a room. One tenth of the humans have lost a leg. The total numbers of feet are 77. Then the number of dogs is:
- 4
- 5
- 6
- Not determinable due to insufficient data
Q. The average age of a group of persons going for a picnic is 16 years. Twenty new persons with an average age of 15 years join the group on the spot due to which their average becomes 15.5 years. The number of persons initially going for the picnic is
- 10
- 20
- 30
- 5
Q. The numbers 3, 5, 7 and 9 have their respective frequencies x−2, x+2, x−3 and x+3. If the arithmetic mean is 6.5, then the value of x is
- 4
- 5
- 6
- 3
Q. Find the mean marks per student, using Step Deviation method method:
Marks51525354555Number of students12182720176
Marks51525354555Number of students12182720176
Q. Solve for x and y.
5x+6y=7x+3y=3(x+6y−6)
- None of these
- x=2, y=6
- x=1, y=3
- x=3, y=2
Q.
Consider the following distribution of SO2 concentration in the air(in ppm = parts per million) in 30 localities. Find the mean SO2 concentration using assumed mean method. Also find the values of A, B and C
Class IntervalFrequency(fi)Class mark(xi)di=xi−a0.00−0.0440.02−0.080.04−0.0890.06A.........0.08−0.1290.10B........0.12−0.1620.140.040.16−0.2040.18C........0.20−0.2420.220.12Total∑fi=30
-0.04, 0, 0.04, 0.098
-0.04, 0, 0.04, 0.2
-0.04, 0, 0.04, 0.6
-0.04, 0, 0.04, 0.5
Q.
Find the value of 'p' if the mean of the following data is 17.
Q.
Calculate the mean of the given data using assumed mean method. Provided that the assumed mean ‘𝒂’ is 17.
- 18.1
- 17.8
- 19.1
- 18.8
Q. Hameed has built a cubical water tank with lid for his house, with each other edge 1.5m long. He gets the outer surface of the tank excluding the base, covered with square tiles of side 25cm. Find how much rupees he would spend on the tiles if the cost of the tiles is Rs. 360 per dozen.