Question

when two or more events can occur concurrently it is called
a. a tree diagram.
b. joint probability.
c. empirical probability.
d. conditional probability.

Explanation:

• A tree diagram is a visual tool for mapping event sequences, not concurrent events.
• Empirical probability is based on observed data/frequency, unrelated to concurrent events.
• Conditional probability is the chance of an event given another has occurred, not concurrent occurrence.
• Joint probability specifically refers to the likelihood of two or more events happening at the same time.

Answer:

b. joint probability.