Statisticshard · Past Paper
In a box, there are 10 red, 20 blue and 30 green marbles. 5 marbles are drawn. What is the probability that all are blue?
A20C5 / 60C5
B20 / 60
C1/5
D1/12
✓ Correct Answer: A — 20C5 / 60C5
Probability = (Number of ways to choose 5 blue) / (Total ways to choose 5) = 20C5 / 60C5.
Share this question
More from Statistics
- If the total number of items in a frequency distribution is 50, what is the position of the median?
- In the construction of a cumulative frequency table, we use:
- A box contains 5 red, 8 white and 4 green marbles. What is the probability that a marble drawn is not white?
- If P(A) = 0.4 and P(B) = 0.5, and A and B are independent events, find P(A and B).
- Which of the following is affected most by a change in scale (multiplication)?