Question
The probability that Ryan chooses Spanish is 0.86 and the probability that Riley chooses Spanish is 0.73. State the probability that:
a. they both chose Spanish
b neither of them choose Spanish
c. only one of them chooses Spanish
d. at least one of them chooses Spanish
a. they both chose Spanish
b neither of them choose Spanish
c. only one of them chooses Spanish
d. at least one of them chooses Spanish
Answers
PsyDAG
a. If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events.
b. (1-.86)(1-.73) = ?
c. Either-or probabilities are found by adding the individual probabilities.
(1-.86) .73 = ?
OR
(1-.73) .86 = ?
d. This means one or both, so you need to add answers to a and c.
b. (1-.86)(1-.73) = ?
c. Either-or probabilities are found by adding the individual probabilities.
(1-.86) .73 = ?
OR
(1-.73) .86 = ?
d. This means one or both, so you need to add answers to a and c.