Selected MCQ

Current Question
12 people draw lots. Probability that one specific host has dinner is ____.
  • A. One
  • B. Zero
  • C. Three
  • D. Cannot be
Correct Answer: D
Explanation:
Insufficient clarity.
Related Question 1
In a party of 5 couples, 5 people are chosen. What is the probability of at least two couples?
  • A. 5/21
  • B. 5/14
  • C. 9/14
  • D. 16/21
Correct Answer: A
Explanation:
Using combinations and the complement method gives 5/21.
Related Question 2
A drawer contains 4 white, 3 blue, and 5 grey socks. What is the probability of selecting two socks of the same color?
  • A. 4/11
  • B. 1
  • C. 2/33
  • D. 19/66
Correct Answer: D
Explanation:
Probability of the same color = 19/66.
Related Question 3
Three dice are thrown. Probability that no two show same number is ____.
  • A. 7/12
  • B. 5/9
  • C. 1/36
  • D. 5/12
Correct Answer: B
Explanation:
Favorable = 120 → 120/216 = 5/9.
Related Question 4
Three dice are thrown. Probability that exactly two show same number is ____.
  • A. 5/9
  • B. 5/12
  • C. 1/36
  • D. 7/12
Correct Answer: B
Explanation:
Favorable outcomes = 90 → 90/216 = 5/12.
Related Question 5
Three dice are thrown. Probability that all show the same number is ____.
  • A. 1/216
  • B. 1/36
  • C. 5/9
  • D. 5/12
Correct Answer: B
Explanation:
Favorable = 6, total = 216 → 6/216 = 1/36.