Question

the mean of 10 numbers is 50 if one more number is order then the mean is 50 itself find the added number



Standard :-9th

Answer 1

Let the sum of the ten numbers be a and the new number added be b

Mean = a/10

a/10 = 50

=> a = 500 ------(1)

When new number is added

Mean = 50

=> (a+b)/ 11 = 50

=> a + b = 550

=> 500 + b = 550

=> b = 550 - 500

=> b = 50

The number that is added is 50

Answer 2

Answer:

Step-by-step explanation:

Let the sum of 10 numbers be x

And the added number be y.

a/10=50

a=500

a+b/11=50

a+b=550

Added number = 550-500

=50