Question

the average of two middle rational number 4/7,1/3,2/3and 5/9 arrange them in acending order

Answer 1

Ascending order:1/3<5/9<4/7<2/3
Average of middle rational numbers=[(5/9)+(4/7)]/2
                                                         =(71/63)/2
                                                         =71/126

Answer 2

=[(5/9)+(4/7)]/2
 =(71/63)/2
 =71/126