The mean of five numbers is 10 and the mean of two of them is 13. The mean of the
remaining three is
A. 7 B.8 C. 12 D.23 E.24
- There are seven numbers arranged in row, whose mean is 11. The mean numbers of first four
numbers is 8 and the last four number is 14. Then the median of the arrangement is
A.9 B.10 C.11 D.12 E.13
- Given that the class interval is 34-38. Which of the following is (are) true?
- The class limits of the interval are 34 and 38.
- The midpoint of the interval is 35.
- The lower class boundary is 33.5.
A. 1 only B. 2 only C. 3 only D. 1 and 2 only E.1 and 3 only
- The mean of the numbers a1,a2,a3,……..,a7 is 20, then the mean of the numbers
a1+2, a2+4,a3+6,………,a7+14 is
A. 19 B.20.9 C. 24 D. 20 E.28
- The product of the median and the mode of the numbers 1,4,4,4,5,5,9,16 is
A. 96 B.30 C.24 D. 20 E.18
12.Seven values 3,3,3,4,5,8 and x . If the mean of these seven values is equal to twice their
mode , then x=………
13.The mean of the numbers log2,log〖3/2〗 ,log〖4/3〗 ,….,log〖100/99〗 is
A.log〖50/49〗 B.log〖51/50〗 C. 0.01 D.0.02 E.2/99
- The mean of 3,7,x,11-x, x-1 is 5, then the value of x is
A.3 B.4 C. 5 D. 5.5 E.7.5
- If the average of three numbers a,b,c is x , then the average of a+3, b-1, c-5 is
A. x B. x+1 C.x-1 D. 3x-1 E.x+2
The pendulum on a clock swings through an angle of 2 radians, and the tip sweeps out and
arc of 6 inches. Then the length of the pendulum is
A. 3 inches B. 12 inches C. 24 inches D. 12/π inches E. 24/π inches
- The area of a sector of a circle is 143 cm2and the length of the arc of the sector is 11 cm .
Then the radius , in cm, of the circle is
A. 11 B.13/2 C.26 D. 13 E. None of these
- The figure shows a sector OMN of a circle at centre O with the radius r = 6 cm and a
perimeter of 16 cm . The area of sector MON = ………
A. 24〖cm〗^2 B. 36〖cm〗^2 C. 15〖cm〗^2 D.12〖cm〗^2 E. 9〖cm〗^2
