Statisticseasy · Past Paper
What is the probability of a certain event?
A0
B1
C0.5
D-1
✓ Correct Answer: B — 1
A certain event is an event that is guaranteed to happen, so its probability is 1.
Share this question
More from Statistics
- Calculate the mean of the squares of the first three natural numbers.
- If the mean of x and 1/x is M, what is the mean of x^2 and 1/x^2?
- From numbers 1 to 50, a number is chosen. What is the probability it is a perfect square?
- If P(A) = 0.5, P(B) = 0.4 and events are mutually exclusive, find P(not A and not B).
- Find the value of k if the mean of 2, 4, 6, k, 10 is 6.