The document discusses blood types and the probabilities of two married people having the same or compatible blood types. It notes that there are four main blood types - O, A, B, and AB - and provides the percentages of people in the United States with each type. It then asks what the probability is that two married people both have type O blood (4% x 4% = 0.16% or 1 in 625) and what the probability is that they have the same blood type regardless of type (46% x 46% + 40% x 40% + 10% x 10% + 4% x 4% = 33% or 1 in 3).

2. 

3. 

4.  Blood comes in four types: O, A, B, and AB. The
percentages of people in the United States with
each blood type are shown below:
4%
10%
O
46% A
B
AB
40%

5. 1) What is the probability that two people getting
married both have blood type O? What assumption
are you making?
4%
10%
O
46% A
B
AB
40%

6. 2) What is the probability that two people getting
married both have the same blood type? What
assumptions are you making?
4%
10%
O
46% A
B
AB
40%