Question

8.
In a city the average rainfall for the first. 12 days was 6 mm. The average rainfall for the first
20 days was 5.4 m. What was the average rainfall for the last 8 days out of those 20 days?
a) 4.5 mm
b) 5.2 mm
c) 4.6 mm
d) 5 mm
​

Answer 1

Answer:

a.)4.5 mm

Step-by-step explanation:

6 = sum of rainfall in 12 days / 12

sum of rainfall in 12 days = 6*12 = 72 mm

5.4= sum of rainfall in 20 days / 20

sum of rainfall in 20 days = 5.4*20 = 108 mm

sum of rainfall in last 8 days = 108 - 72 = 36 mm

average rainfall in last 8 days = 36/8 = 4.5 mm

Hope u understand it !!