if the mean of 4 observation is 20 and when a constant C is added to each observation ,the mean becomes 22,the value of C is
Answers
Answered by
0
sum of observation =mean*number of observation
=20*4
=80
after c added the mean becomes22
and c is added so,the number of observation=5
sum of observation=22*5
=110
value of c=110-80
=30
Similar questions