Question

8) Mean of 5 observations x,x+2, 2+4 , X+6
and x+8 is 14. Find the mean
of first
3 observation​

Answer 1

Step-by-step explanation:

x+x+2+x+4+x+6+x+8/5=14

5x+20/5=14

5x+20=70

5x=50

x=10

now,

10+10+2+10+4/3

=36/3

=12

required mean=12

Answer 2

Step-by-step explanation:

x, x+2, x+4, x+6, x+8 ÷ 5 is equal to 14

i.e.

5x+20 = 14*5

5x+20= 70

5x = 70-20

5x= 50

x= 50/5

x= 10

check out

10 +(10+2)+(10+4)+(10+6)+(10+8)/5=14

10+12+14+16+18/5 =14

70/5=14

14=14

hence proved.