Question 274078
The mean of 4 numbers is x , the mean of the same 4 numbers and 73 is 9 , find x
:
Let t = the total of the 4 numbers
then
{{{t/4}}} = x
t = 4x
:
"the mean of the same 4 numbers and 73 is 9 "
{{{(t+73)/5}}} = 9
t + 73 = 5(9)
t + 73 = 45
t = 74 - 73
t = -28
then
4x = -28
x = -7