(7(9) + x)/8 = 6
63 + x = 48
x = -15
So you would have to add a negative number ?
A set of 7 numbers has a mean of 9. What
additional number must be included in this set to create a new set with a mean that is 3 less than the mean of the original set?
2 answers
I do not know the answer to this problem but, I am having trouble understanding it. You see, if you multiply 7x9 and get 63, other sources are saying to multiply 6x8 after and I have no clue why, where did the 8 come from?
2 answers