Chawee86601 Chawee86601 19-02-2024 Biology contestada Adam is 5 years older than his sister Barb. The sum of their ages is 21. How old is Adam? How old is Barb? a) Adam: 13 years, Barb: 8 years b) Adam: 12 years, Barb: 9 years c) Adam: 11 years, Barb: 10 years d) Adam: 10 years, Barb: 11 years