This question was from my CAs. Nothing has been changed.
A local weatherman forecasts that there is a 65% chance of rain on the
coming Saturday and a 65% chance of rain on the Sunday immediately following that Saturday.
What can you conclude from the above weather forecast?
Choose one of the following options.
A. It will certainly rain during the weekend (that is, it will rain on at least one of the two weekend days).
B. The chance of rain on Saturday and Sunday is 42.25%.
C. The weather forecast does not sound right, as P(rain on Saturday)+ P(rain on Sunday) > 100%.
D. The chance of rain on Saturday and Sunday is greater than 50%, but less than 85%.
E. The chance of rain on Saturday and Sunday is between 30% and 65%.
F. None of the above.
Chance of raining on Saturday = 0.65 Sunday = 0.65 Therefore, chance of raining on Saturday and Sunday is 0.65*0.65 = 0.4225
Doesn't this means there are two answers, B and E? Which is more correct?