The average of 30 numbers is 40 and that of other 40 numbers is 30. The average of all the numbers is :
A. $$34\frac{2}{7}$$
B. 35
C. 34
D. 34.5
Answer: Option A
Solution(By Examveda Team)
According to the question,Average of 30 numbers is = 40
Sum of 30 numbers is = 40 × 30 = 1200
Average of 40 numbers is = 30
Sum of 40 numbers is = 40 × 30 = 1200
Total average = $$\frac{1200 + 1200}{70}$$
= $$\frac{2400}{70}$$
= $$34\frac{2}{7}$$
Related Questions on Average
A. 125 km/hr
B. 75 km/hr
C. 135 km/hr
D. 120 km/hr
Join The Discussion