Statisticshard · Past Paper
A and B are two students. The probability that A solves a problem is 1/2 and B solves it is 1/3. What is the probability that the problem is solved?
A5/6
B2/3
C1/6
D1/3
✓ Correct Answer: B — 2/3
P(solved) = 1 - P(neither solves) = 1 - (1/2 * 2/3) = 1 - 1/3 = 2/3.
Share this question
More from Statistics
- Find the probability of getting a number between 1 and 6 (excluding 1 and 6) when a die is thrown.
- The median of 11, 12, 14, 18, x, 22, 25, 28 (arranged in ascending order) is 20. Find x.
- In a symmetric distribution, the relationship between Q1, Q2, and Q3 is:
- Median is also known as the:
- If P(A) = 0.5, P(B) = 0.4 and events are mutually exclusive, find P(not A and not B).