Question

If the mean of the following distribution is 2.6, then the value of 'y' is
Variable (x) 1, 2, 3, 4, 5
Frequency
4, 5, y, 1, 2
1)3
2) 8
3) 13
4) 24
​

Answer 1

1*4=4

2*5=10

3*y=3y

4*1=4

5*2=10

4+10+3y+4+10/12+y=2.6

28+3y/12+y=2.6

28+3y=2.6(12+y)

28+3y=31.2+2.6y

3y-2.6y=31.2-28

0.4y=3.2

y=8