The marks obtained in chemistry by the 15 students of class XI B are
20, 15, 10, 20 27, 28, 27, 10, 20, 30 35, 40, 41, 41, 20 then the value of mode is
10
20
27
41
The mean of 5 numbers is 18. If one number is excluded, their mean becomes 16, then the excluded number is
18
25
26
30
The median of the daily wages of ten worker in Rs. 20, 25, 17, 18, 8, 15, 22, 11, 9, 14 is
15
16
17
The median of marks of 9 student in a class are 34, 32, 48, 38, 24, 30, 27, 21, 35 is
32
34
38
The median of the observations 2, 30, 12, 25, 20, 8, 10, 4, 15, Is
12
The mean deviation from the observations 3, 8, 12, 19, 20 is
6.5
7.9
8.5
9.7
Geometric means of 2, 22, 23, . . . . . 2n is
22/n
2n/2
2n
2(n+1)/2
The heights ( in cm ) of the 15 students of a class are 152, 145, 156, 149, 151, 159, 148, 160, 153, 154, 150, 143, 155,
157, 161 cm. The median of height of the student is
152 cm
149 cm
153 cm
150 cm
The mean of first n - natural number is
n/2
The arithmetic mean of n number of a series is . If the sum of first ( n - 1 ) number is K then the nth number is