Question

Cards numbered 1 to 20 are mixed up and then a card is drawn at random. What is the probability that the card has a number which is a multiple of 2 or 5?

1. 1/5
2. 2/5
3. 3/5
4. 1
5. 4/5

Answer 1

Correct Answer - Option 3 : 3/5

Given:

Cards numbers are = 1 to 20

Calculation:

Total number of cards = 20

Cards having numbers multiple of 2 or 5 = {2, 4, 5, 6, 8, 10, 12, 14, 15, 16, 18, 20}

∴ Number of cards having numbers multiple of 2 or 5 = 12

∴ Probability that the card has a number which is a multiple of 2 or 5 = 12/20 = 3/5