Statisticsmedium · Past Paper
From a set of cards numbered 1 to 20, one card is drawn. What is the probability that the number is a multiple of 3 or 7?
A8/20
B2/5
C9/20
D7/20
✓ Correct Answer: A — 8/20
Multiples of 3: 3, 6, 9, 12, 15, 18 (6). Multiples of 7: 7, 14 (2). Total = 8. P = 8/20 = 2/5.
Share this question
More from Statistics
- In the construction of a cumulative frequency table, we use:
- What is the probability of getting a sum of 2 when two dice are thrown?
- If the mean of $n$ numbers is $M$, and the sum of first $(n-1)$ numbers is $S$, the $n^{th}$ number is:
- Given Mean = 20 and Median = 21, find the Mode using empirical formula.
- For a symmetrical distribution, which of the following is true?