We had some good solutions to this problem. Rukmini from Dowanhill Primary wrote:
You're right, Rukmini, well done. Nicholas who goes to Lochinver House School and Courtney from Holystone Primary expressed their solution in a slightly different, but equally as good, way. Courtney said:
It is not fair because Terry has a one in three chance but Ali has a $2$ in $3$ chance.