Statisticshard · Past Paper
Three fair coins are tossed. What is the probability of getting exactly two tails?
A1/8
B3/8
C1/2
D1/4
✓ Correct Answer: B — 3/8
Sample space has 8 outcomes. Outcomes with 2 tails: TTH, THT, HTT. 3/8.
Share this question
More from Statistics
- A cumulative frequency curve is also known as:
- Find the weighted mean of 10, 20, 30 with weights 1, 2, 3 respectively.
- If P(A) = 0.8, find P(A') in percentage.
- If the mode of a distribution is 15 and the mean is 15, what is the median?
- In a class, 40% students play football, 50% play cricket and 10% play both. What is the probability a student plays neither?