Question

given the mean of 9, 5, 8, y, 12, 2y and 10 is y , find the value of y,please help me to finish my homework

Answer 1

mean refers to the average of the numbers....
and is calculated by sum of numbers over the count of numbers

and here in this question
u would get the following equation on using the formula
(9+5+8+y+12+2y+10)/7 = y

on cross multiplying it we get

44 + 3y = 7y

now solve it further nn u could get the value of y