Question

1) Find the mean of first 5 prime numbers.

2) The mean of x + 8 , x + 6 , x + 2 and x is 24 . Find the value of x.

Answer 1

Answer:

1) 9

2) 2

Step-by-step explanation:

1] first five prime numbers = 1, 2, 3, 5, 7

mean = sum of these prime numbers ÷ 2

= 1+2+3+5+7

2

= 18

2

= 9

2] mean = 24

=> (x+8) + (x+6) + (x+2) + x = 24

=> 4x + 16 = 24

=> 4x = 24 - 16

=> 4x = 8

=> x = 8

4

•°• x = 2