InNovember, the rain in a certain valley tends to fall in storms of severaldays' duration. The unconditional probability of rain on any given day of the month is 0.400.But the probability of rain on a day that follows a rainy day is 0.900,and the probability of rain on a day following a non rainy day is 0.200.

Find the probability of rain on November 1 and2, but not on November 3.