Question

Find the value of x.
a) The mean of 12,18, x,27,16 and 22 is 20.


b) The median of 5,9,9,15,4x+1,16,19,19 and 21 in ascending order is 17.


c) The mode of 33,45,51,40,51,28,33,51, x and 23 is 51.​

Answer 1

Answer:

a) •(12+ 18+x+27+16+22 )/6=20

• 12+ 18+x+27+16+22 = 120

• x+ 95= 120

• X = 120 -95 = 25.

b) • [5+ 9+9+15+(4x+1)+16+19+19+21 ]/9= 17

• 113+(4x+1)= 9×17 = 153

• 4x +1 = 153-113 = 40

• 4x = 39

• X = 39 /4 = 9.75

c) •(x +33+45+51+40+51+28+33+51+23 )/10 = 51

• X+355 = 510

• X = 155

Answer 2

Answer:

Step-by-step explanation:

a) •(12+ 18+x+27+16+22 )/6=20  

• 12+ 18+x+27+16+22 = 120  

• x+ 95= 120  

• X = 120 -95 = 25.

 

b) • [5+ 9+9+15+(4x+1)+16+19+19+21 ]/9= 17  

• 113+(4x+1)= 9×17 = 153  

• 4x +1 = 153-113 = 40  

• 4x = 39  

• X = 39 /4 = 9.75

 

c) •(x +33+45+51+40+51+28+33+51+23 )/10 = 51  

• X+355 = 510  

• X = 155