Statisticsmedium · Past Paper
A bag contains 3 red, 5 black and 4 white balls. What is the probability that a ball drawn is NOT black?
A5/12
B7/12
C1/3
D3/4
✓ Correct Answer: B — 7/12
Total = 12. Non-black = 3 (red) + 4 (white) = 7. Probability = 7/12.
Share this question
More from Statistics
- The mean of 5 numbers is 18. If one number is excluded, their mean becomes 16. The excluded number is:
- What is the mode of the following numbers: 2, 3, 3, 4, 5, 3, 2, 1?
- Two cards are drawn from a pack of 52 cards without replacement. What is the probability that both are aces?
- A letter is chosen from the word 'NEPAL'. What is the probability that it is a vowel?
- In a pie chart representing a student's time, if 'Sleep' takes 8 hours, what is its central angle?