Question

Difference between the average of first 10 even numbers and that of first 10 odd numbers

Answer 1

average of first 10 even numbers

2+4+6+8+10+12+14+16+18+20

= 110÷10

= 11

average of first 10 odd numbers

1+3+5+7+9+11+13+15+17+19

= 100÷10

= 10

difference between them

11 - 10 = 1

Answer 2

Answer:

Diff. betwn. the av. of first 10 even numbers and that of odd numbers is 12

Step-by-step explanation:

ten even numbers are = 2,4,6,8,10,12,14,16,18,20

average of them(A1)=(2+4+6+8+10+12+14+16+18+20)/2

                           =124/2

                           =62

ten odd numbers are = 1,3,5,7,9,11,13,15,17,19

Average of them(A2)=1+3+5+7+9+11+13+15+17+19

                                  =100/2

                                  =50

then,A1-A2=62-50=12