Question

The mean of 5 obrevation is 19 .find the fifth obrevation,if the four obrevation are 16,18,15and12.​

Answer 1

we know that sum of obsevation / no of observation

so , 16 +18+15+12+x/5 =19

61+ x=19

x=19 - 61

x=-42

Answer 2

16 + 18 + 15 + 12=61

19=x/5

19×5=x

95=x

95-61= 34