Question

the mean of the three numbers is 8. the mean of the other four number is 15 .find the mean of all the numbers​

Answer 1

Step-by-step explanation:

mean of all the numbers = (8×3 + 15×4)/7

= ( 24+ 60 ) /7

= 84/7

= 12

mean = €x/ n

so €x = mean × n

Answer 2

Answer:

mean of all the numbers =( 8× 3+15×4)

=24+60

=84/7

=12