Answer:


Step-by-step explanation:
we have

Adds 18 both sides

Complete the square


Divide by 9 both sides

Rewrite as perfect squares

4/50 as a decimal is .08
Divide 4 by 50
Answer:
a) Interquartile range= upper quartile- lowwr quartile
= Q3- Q1
= 4.75-2.25
= 2.50
b) ( 2.5 ÷ 6 ) × 100
= 41.67%