Question

you are given value of 5th items as 4, 6 ,8 ,10, 12 (1) find the mean of all observation (2) if mean is increase by 2 then what should be the value of last two last items. so that the mean remain the same​

Answer 1

answer : (1) mean of 4,6,8,10,12 is 8

Explanation:

another name of mean is average .so,the formula of average or mean

= sum of observations ÷no.of observations

=4+6+8+10+12÷5

=40÷5

=8