The mean of 5, 9, x, 17, and 21 is 13, then find the value of x _______.

(a)

9

(b)

13

(c)

17

(d)

21

The mean of the first 10 prime numbers is ___________

(a)

12.6

(b)

12.7

(c)

12.8

(d)

12.9

The mean of a set of numbers is \(\bar X\). If each number is multiplied by z, the mean is _______.

(a)

\(\bar X + z\)

(b)

\(\bar X-z\)

(c)

z\(\bar X\)

(d)

\(\bar X\)

Let be the mid point and b be the upper limit of a class in a continuous frequency distribution. The lower limit of the class is

(a)

2m-b

(b)

2m+b

(c)

m-b

(d)

m-2b

The mean of set of seven number is 81. If one of the nimbers is discarded,the mean of remaining number is 78. The value of discarded number is

(a)

101

(b)

100

(c)

99

(d)

98

For which set of number do the mean,median and mode all have the same valuas?

(a)

2,2,2,4

(b)

1,3,3,3,5

(c)

1,1,2,5,6

(d)

1,1,2,1,5

The mean of a, b, c, d and e is 28. If the mean of a, c and e is 24, then mean of b and d is _______________

(a)

24

(b)

36

(c)

26

(d)

34

The mean of 5, 9, x, 17,and 21 is 13 then find the value of x ___________

(a)

9

(b)

13

(c)

17

(d)

21

The mean of the first 10 prime number is _______________

(a)

12.6

(b)

12.7

(c)

12.8

(d)

12.9

The mean of set of numbers is \(\bar{x}\) If each number is multiplied by z, the mean is

(a)

\(\bar{X}+z\)

(b)

\(\bar{X}-z\)

(c)

\(z\bar{X}\)

(d)

\(\bar{X}\)