Question

The mean of 7 numbers is 13 and the mean of 13 other numbers is 7. What is the mean of all 20 numbers?

Answer 1

Step-by-step explanation:

Sum of first 7 numbers will be - 7x13=91

Sum of next 13 numbers will be - 13x7=91

Total sum=182

Mean of all 20 numbers will be 182/20=9.1

Hope it helps you!