Question

the average age of our family of four 35. excluding me the average age is 40. find my age.

Answer 1

Average => (sum of quantities)/(no.of quantities)
_____________________

Here,

35 = (sum of 4 ages)/4

35*4 = sum of 4 ages

140 = sum of 4 ages,


Then, if you excluded, average became 40

Now,

40 = (sum of 4 ages - your age)/3

40 * 3 = 140-your age

120 = 140 - your age

120-140 => - your age

-20 = - your age

20 = your age



Now, your age is 20




I hope this will help you



-by ABHAY

Answer 2

30 is your age.


Hope that this is the required answer.