Arithmetic Mean

The arithmetic mean of: 4 and 6 is ........

• 5

• 6

• 4.5

• 5.5

The arithmetic mean of: 1,2,3,4,5 is ........

• 1

• 3

• 4

• 2

The arithmetic mean of: 35,50,60,55 is ........

• 30

• 40

• 50

• 60

The arithmetic mean of:  $\frac{1}{2}$  and 1 is........

•  $\frac{1}{4}$  
  

•  $\frac{1}{8}$  

•  $\frac{1}{2}$  

•  $\frac{3}{4}$  
  

The arithmetic mean of the values

 $x,x-y,y-x$  is ......

•  $xy$  

•  $\frac{y}{2}$  

•  $\frac{x}{2}$  

•  $\frac{x}{3}$  

If the arithmetic mean of the numbers 9,4,5,x, is 5, then x=..............

• 2

• 3

• 4

• 5

If the arithmetic mean of the numbers 3,4,8,a,a+2 is 15, then a=.........

• 29

• 58

• 75

• 17

If the arithmetic mean of the marks of 5 students is 20 marks, then the sum of their marks equals .........marks

• 4

• 15

• 25

• 100

If the arithmetic mean of the ages of Hanan and Wesam is 7 years and the age of Hanan is 8 years, then the age of Wesam is .......... years.

• 6

• 7

• 8

• 15

If the arithmetic mean of the side lengths of a triangle is 8cm, then the perimeter of the triangle is ..........

• 8cm

• 18cm

• 24cm

• 15cm