The table below shows the probability that a mother in a given part of the income distribution (given by the row)

will have a daughter in a given part of the income distribution (given by the column). So, for example, the daughter of a woman with income in the bottom third of the income distribution will herself have a 60% chance of being in the bottom third, a 25% chance of being in the middle third, and a 15%

chance of being in the top third.

What is the probability that the granddaughter (along the maternal line) of a woman in the middle third of the income distribution will herself be in the middle third of the income distribution? Show how you got your answer.