Question

The average of 30 numbers is 40 and that of other 40 number is 30 the average of all numbers

Answer 1

Answer:

2400/7 =34.29

Step-by-step explanation:

PART-I

Average of 30 numbers = 40

Sum of all numbers = 40*30 =1200

PART-II

Average of 40 numbers = 30

Sum of all numbers = 40*30 =1200

PART-III

Sum of all numbers = 1200+1200 = 2400

No. of 'numbers' = 40+30 = 70

Average of 70 numbers = 2400/7 =34.29