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WorksheetsMean &...
Total questions: 25
Worksheet time: 33mins
The mean of four numbers is 10.
Three of the numbers are 9, 11 and 7.
Work out the fourth number.
9
13
11
15
Mr Holland gives his class a test. The results are:
34%, 44%, 75%, 21%, 98%, 86%, 71%, 76%, 63%, 55%
How many students scored above the mean percentage?
4
5
6
7
Find the mean of first 5 prime numbers.
5.6
6
6.5
7
How many common tangents?
0
1
2
3
4
The mean of 8, 11, 6, 14, x and 13 is 66. Find the value of the observation x.
344
343
434
443
The method to calculate mean using this formula is called..
Direct method
Assumed mean method
Step-deviation method
Alternate method
Five basketball players try to make as many points as possible in each game. They have a mean of 12 points per game. If the first four players score 10, 14, 20, and 8 points each, how many points must the fifth player have made?
20 points
8 points
12 points
10 points
How many common tangents?
0
1
2
3
4
What is the mid point for the class interval 42-47
44
2.5
41.5
44.5
For the following class interval, determine the class size.
42-47
48-53
54-59
60-65
5
6
4
3
If the value of mean for the data given 35,21,15,x,13,18,y and 20 is 40 , Find the value of x+y.
198
195
196
199
What is the formula to calculated the mean for grouped data?
Mean = Sum of frequency
Total midpoint
Mean = Sum of ( midpoint × frequency )
Total frequency
Mean = Sum of midpoint
Total frequency
Mean = Sum of frequency
Total frequency
(a)
The mean of the following frequency distribution is 50, but the frequencies f 1 and f 2 in classes 20-40 and 60-80, respectively are not known. Find these frequencies, if the sum of all the frequencies is 120.
f1=14.f2=18
f1=16,f2=22
f1=28,f2=24
f1=22,f2=28
The mean of six numbers is 15. If 2 is taken away from every number, then find the new mean.
(a)
(a)
The arithmetic mean of 5 numbers is 27. If one of the numbers be excluded, their mean is 25. The excluded number is :
(a)
