SAT math average statistics
Could you help with the following question:
"The average of x and y is 10 and the average of x,y and z is 15. Find the value of z."
Thanks in advance!!
SAT math average statistics
Could you help with the following question:
"The average of x and y is 10 and the average of x,y and z is 15. Find the value of z."
Thanks in advance!!
SAT math average question
The arithmetic mean, also known as average, is the sum of all the values in a list of numerical values divided by the number of items in the list."The average of x and y is 10 and the average of x,y and z is 15. Find the value of z."
"The average of x and y is 10" : (1)
"the average of x,y and z is 15" : (2)
Subtracting (1) and (2) you have that
Thanks Jack!!
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