Question

. If the mean of six observations y, y + 1, y + 4, y + 6, y + 8, y + 5 is 13,

find the valueof y.​

Answer 1

Answer:

observations= y ,y+1, y+4, y+6, y+8, y+5

mean =sum of observations/no.of observations

= y+y+1+y+4+y+6+y+8+y+5/13

= 6y+19/13

=6y+19

6y=19-13

6y=6

y=6/6

y=1

Answer 2

Answer:

y+(y+1)+(y+4)+(y+6)+(y+8)+(y+5)/6=13

so,

6y+1+4+6+8+5/6=13

then,

(6y+24)/6=13

then,

6y+24 = 13×6

6y+24 = 78

6y =78-24

6y = 54

y = 9