Solution:let the age of captain = xAge of younger player = (x-11)
Total age of 11 players = no. of players * average age
= 11 * 28 = 308 years
Total age of first group
Total age of second group
= 3 * 25 = 75
sum = 3 * 28 = 84
Total age of group third
= 3 * 30 = 90
age of 9 players
= 75 + 84 + 90 = 249
Sum of the age of captain and younger player = 308 - 249
x + (x-11) = 59
2x = 59+11
x= 70/2; x= 35
Age of captain= 35 years