問題文
A tutoring center records that 30 percent of its students attend the evening session. Independently of that, 20 percent sit the optional mock exam. An analyst multiplies 0.30 by 0.20 and reports 0.06 as the share who do both. Which statement justifies the calculation?
選択肢
- Multiplying the two rates is valid because the events are plainly exclusive, and the product is the combined probability.
- Multiplying the two rates is valid because the events are clearly independent, and the product is the combined probability.
- Multiplying the two rates is valid because the events are clearly independent, and the product is the overall probability.
- Multiplying the two rates is valid because the events are plainly exclusive, and the product is the overall probability.