Question

Find the mean of each set of data.
B
1. The first four whole numbers
2. The first three prime numbers
3. All the factors of 3
4. All the odd numbers between 3 and 9
5. The first three multiples of 5
6. The numbers 3, 4, 6, 0, 7, 4
7. All the even numbers from 21 to 25

Answer 1

MEAN = Sum of all numbers/ Number of numbers

1. 0,1,2,3

0+1+2+3/4

6/4

= 1.5

2. 2,3,5

2+3+5/3

10/3

=3.3333....

3. 1,3

1+3/2

4/2

=2

4. 5,7

5+7/2

12/2

=6

5. 5,10,15

5+10+15/3

30/3

=10

6. 3,4,6,0,7,4

3+4+6+0+7+4/6

24/6

=4

7. 22,24

22+24/2

46/2

=23