tin contains 4 cress seeds and 5 pumpkin seeds.
Alana takes a cress seed from the tin and plants it.
a) How many cress seeds are in the tin now?
b) What is the total number of seeds in the tin now?
Alana takes another seed out of the tin at random. Work
out the probability that it is a cress seed.
Give your answer as a fraction in its simplest form.