The mean length of rope in 40 coils is 14m. A new coil is added in which the length of the rope is 18m. What is the mean length of the ropes now?
14.5 m
14.1 m
14.3 m
14 m
Runs scored by 11 players of a team are 40, 32, 15, 1, 75, 21, 25, 5, 0, 9, 10. Find the lower quartile of the data.
8
4
6
5
Find the mean of 7, 11, 6, 5,and 6, if each number given is diminshed by 2.
7
Find the median of the following marks obtained by 16 students in a class test marked out of 10 marks.0, 0, 2, 2, 3, 3, 3, 4, 5, 5, 5, 5, 6, 6, 7 and 8.
4.5
5.4
Σ fi=
A boy scored following marks in various class tests during a term. 15, 17, 16, 7, 10, 12, 14, 16,19, 12, 16What are his median marks?
17
15
12
19
Find the mean of following set of numbers.6, 9, 11, 12 and 7
9
9.5
9.2
9.6
Find the mode: 0, 0, 2, 2, 3, 3, 3, 4, 5, 5, 5, 5, 6, 6 and 7.
0
The arithmetic mean of first n natural numbers is
n/2
n/2 + 1
n+1/2
n-1/2
