Statisticsmedium · Past Paper
If P(A) = 0.6 and P(B) = 0.2 and A and B are mutually exclusive, what is P(A or B)?
A0.8
B0.12
C0.4
D1
✓ Correct Answer: A — 0.8
For mutually exclusive events, P(A or B) = P(A) + P(B) = 0.6 + 0.2 = 0.8.
Share this question
More from Statistics
- For a data set where all values are the same (e.g., 7, 7, 7, 7), the variance is:
- If the mean of x and 1/x is M, what is the mean of x^2 and 1/x^2?
- In a bar chart, if the total frequency is 100 and a bar height is 25, what percentage does it represent?
- What is the mean of the first five prime numbers starting from 2?
- A box contains 5 red, 8 white and 4 green marbles. What is the probability that a marble drawn is not white?