Answer: √(npq).
- A np
- B npq
- C √(npq)
- D np√q
Correct answer: C. √(npq)
Explanation: SD = sqrt(npq) where q = 1-p.
Venn diagram of the universal set U with events A and B, showing the intersection (A and B), the parts unique to each event, and the complement region outside both.
Concept context
Chance, events, conditional probability, and Bayes theorem