Hi, This is my question:
The prob of 20 year 9 students to have a swimming pool is 0.2.
If they have a swimming pool the prob that they swim is 0.7.
Draw a tree diagram.
Find the prob of the year that swim.
would i do this?
then would i do 0.7 X 0.3= 0.21?
would this be corrects? if not where am i going wrong?