Answer:
Class 8 has 27 and class 7 has 40
Step-by-step explanation:
8th (r) class has 13 fewer than 7th (x).x -13 = rTotal for both classes = 67 r + x - 13 = 67r + x = 8080 divided by two = 40 (per class)40 - 13 = 27
all i know is that it is not the IQR maybe its the MAD but im not sure
22/4
3
Note that
( )² = a, for example
( )² = 10² = 100 ← value inside the radical
Thus
( )² = 3