He could put 5 in one and another 5 in the other. So just divide so he could put 2 snails in 5 different tanks and so on
Given:





To find:
The variance. of combined set.
Solution:
Formula for variance is
...(i)
Using (i), we get




Similarly,




Now, after combining both sets, we get




Therefore, the variance of combined set is 15.4.
The formula would be 2x-5=x+1. After PEMDAS it would be x=6
The formula is right there in the question. Just write '16' in place of 'b' and write '5' in place of 'h', then do the multiplication and you have the area. / / / If you don't get 40 square mm then you have a mistake somewhere.