Probability question- Help Im stuck

[sweetx]

Question:
A group of 100 people exhibited the following blood types:
A20 B24 AB10 O46
If one person is selected at random, what is the probability

A) The person has type AB blood?
My answer so far:P(type AB blood)=10/100=0.1 or 10%

B)the person has either type A or type O blood?
My answer so far: P(type A blood)=20 P(TYPE O blood)=46 =(20+46)/100=0.66

C) The person does not have type B blood?
I do not know where to start

D) The person has neither type B nor type O blood?


Thank you in advance for your help

[Parcival]

A) The person has type AB blood?
My answer so far:P(type AB blood)=10/100=0.1 or 10%

I agree.

B)the person has either type A or type O blood?
My answer so far: P(type A blood)=20 P(TYPE O blood)=46 =(20+46)/100=0.66

I agree as well.

C) The person does not have type B blood?
I do not know where to start

The probability that something is NOT the case is the probability for all cases minus the probability for that particular case. In other words, calculate the probability for blood type B first (like in question A) and subtract it from 1 (i.e. 100%).

D) The person has neither type B nor type O blood?

Just combine the steps of thought from question B and C to solve this problem.