Assume that there are only two countries: Malaysia and Thailand, and that residents of each own only one asset, domestic land yielding an annual harvest of Durian. Assume that the yield on the land is uncertain. Half the time, Malaysias land yields a harvest of 100 tons of Durian fruit at the same time as Thailands land yields a harvest of 50 tons. The other half of the time the outcomes are reversed. Thailands harvest is 100 tons, but the Malaysian harvest is only 50.

Required: Calculate the average of each country of Durian harves