Look :
6 + 3 = 9 ===》 [ 63 , 9 ]
1 + 4 = 5 ===》 [ 14 , 5 ]
2 + 1 = 3 ===》 [ 21 , 3 ]
2 + 6 = 8 ===》 [ 26 , 8 ]
Answer:
8
Step-by-step explanation:
average is calculated as
average =
= 13 ( multiply both sides by 2 )
sum of 2 eldest = 26
Then for the 4 children
average = = = 8
1.56 dollars
21
1/3= 0.33
7/0.33