The mean of 3 numbers is 7. The mean of
4 other numbers is 8. The mean of 5 other
numbers is 11. What is the mean of all 12
numbers?

9.

Step-by-step explanation:

The sum of the first 3 numbers = 3 * mean = 3*7 = 21.

For the other 4 , the mean = 4*8 = 32.

For the other 5, the mean = 5*11 = 55.

So the total sum for all 12 = 21 + 32 + 55

= 108.

Therefore the mean of all 12 = 108/12

=9.

the answer is a

step-by-step explanation:

39.00 x 24 = total installment price

carrying installment price - cash price

needed to save the .00/

multiple all that

step-by-step explanation:

27×17