MHB Probability of O & AB Blood Types

[qtko]

1. The blood groups of 200 people are distributed as follows: 40 have type A blood, 75 have type B blood, 60 have type O blood, and 25 have type AB blood. If a person from any of the group is selected at random, what is the probability that this person has an O blood type? How about the AB blood type? i hope you will help me.

 

[HOI]

Do you not know the basic definition of probability? You are told that, out of 200 people, 60 have type O blood. 60 is what percent of 200? You are told that, out of 200 people, 25 have type AB blood. 25 is what percent of 200?