Practice30Create account

A number is chosen at random from 1 to 30. What is the probability that it is a multiple of 3 or of 5?

Competition practiceData & Probability
  • A7/15
  • B8/15
  • C1/2
  • D2/5

Step-by-Step Solution

Multiples of 3: 10; of 5: 6; of both (15, 30): 2. Favourable = 10 + 6 − 2 = 14, so P = 14/30 = 7/15.
Answer: A) 7/15

Master this topic in 30 minutes a day.

Don't just memorise the answer — build a daily practice habit.

Practice 5 Similar Questions Free →

All Data & Probability practice questions

More Data & Probability practice

The mean of the first five prime numbers is: (answer as a number)Neha's scores in six tests have a mean of 25. After her seventh test, the mean of all…Twenty cards are numbered 1 to 20. One card is picked at random. What is the probability…The mean of 5 numbers is 18. If the number 12 is removed, find the mean of the remaining…Find the median of the data: 12, 7, 15, 9, 20, 18, 5.