| Tag | Value |
|---|---|
| file | Probability_uva-addition-rule-678-en_uva-addition-rule-678-en |
| name | uva-addition-rule-678-en |
| section | Probability/Elementary Probability/General Rules/Addition rule |
| type | schoice |
| solution | FALSE, FALSE, TRUE, FALSE |
| Type | Conceptual |
| Language | English |
| Level | Statistical Literacy |
| IRT-Difficulty | 2 |
| p-value | 0.5905 |
Human blood consists of one of the blood types O, A, B or AB. However the distribution of these blood groups is different in different races. Below is a table showing the probability for each blood group among black people in America:
———— —— —— —— —- Blood type O A B AB Odds 0.49 0.27 0.20 ? ———— —— —— —— —-
John has blood type B and can only safely accept blood transfusions from people with blood type O or B. If we randomly choose a black person choose randomly, what is the probability for John to find suitable blood?