Question

The mean of three numbers is 5.The mean of other four numbers is 12. Find the mean of all the numbers.

Answer 1

Answer:

9

Step-by-step explanation:

(a+b+c)/3 =5

Thus a+b+c = 15

(m+n+o+p)/4 = 12

Thus m+n+o+p = 48

Now mean for all together

(a+b+c+m+n+o+p)/7 = (15+48)/7 = 63/7 = 9

Answer 2

Answer:

9

Step-by-step explanation:

use the general formula of mean for both of them and solve as shown.