question

Given a stream of numbers, write an algorithm to print the average (mean) of the stream at any point.

Ex. 10, 20, 30, 40...

Average after 1 number = 10

Average after 2 numbers = 15

Average after 3 numbers = 20

Average after 4 numbers = 25

...

Ex. 10, 20, 30, 40...

Average after 1 number = 10

Average after 2 numbers = 15

Average after 3 numbers = 20

Average after 4 numbers = 25

...

Average is defined as: sum of all numbers / count of all numbers

All we need for each consective integer is the previous average (

Thoughts or alternate solution? Let us know in the comments below!

`prev`

) and the count (`n`

) of all previous numbers. The average after including new number `x`

is `(prev*n + x)/(n + 1)`

.
Thoughts or alternate solution? Let us know in the comments below!