Jennifer is playing darts. She throws two darts aiming for a Bullseye.
The probability Jennifer hits the Bullseye on her first throw is y.
The probability she hits the Bullseye on her second throw Y.
(a) Complete the tree diagram.
First throw
Second throw
Hit
13.
Hit
14
.
Miss
Hit
Miss
Miss
(b) Work out the probability Jennifer hits the Bullseye at least once.

Over the course of the school year, you keep track of how much snow falls on a given day and whether it was a snow day. your data indicates that of twenty-one days with less than three inches of snow, five were snow days, while of the eight days with more than three inches of snow, six were snow days. if all you know about a day is that it is snowing, what is the probability that it will be a snow day?