I don't really know how to explain it to you but what I can tell you is that in 1 centigram there are 10 milligrams.
We have to put the numbers in order..
(121,122,125, 126,132),M,(135,136,136,138,140)
minimum : (smallest number) = 121
Q1 : 125
Q2 (median) : (132 + 135) / 2 = 267/2 = 133.5
Q3 : 136
maximum : (largest number) = 140
-8(3 - s) = 32
So you expand the brackets
-24 + 8s = 32
And then solve
+ 24
8s = 56
÷ 8
s = 7
Hope this helps!
