Question

if the average of 5 number is 40. If one number is included then the new number becomes 42. find the new number.​

Answer 1

Answer

4

Step-by-step explanation:

average of 5 numbers =40

that is

5 numbers sum    =     40

      2                

5 numbers  sum     =  40 *  2

sum  =  80

6 numbers sum       =   42

         2

6 numbers sum =  42  *  2

sum =  84

thus new number =

84 - 80

new number = 4