Question

1a. [3 marks]
John likes to go sailing every day in July. To help him make a decision on whether it is safe
to go sailing he classifies each day in July as windy or calm. Given that a day in July is calm,
the probability that the next day is calm is 0.9. Given that a day in July is windy, the
probability that the next day is calm is 0.3. The weather forecast for the 1st July predicts
that the probability that it will be calm is 0.8.
Draw a tree diagram to represent this information for the first three days of July.
1b. [2 marks]
Find the probability that the 3rd July is calm.
1c. [3 marks]
Find the probability that the 1st July was calm given that the 3rd July is windy.

Answer 1

Answer:

hmm I guess yes ☺️ maybe