Question

7.Cards numbered 1 to 30 are put in a bag. A card is drawn at random. The probability that the number on the card is not a multiple of 3 is​

Answer 1

Answer:

Cards present in a bag - numbered as 1 to 30.

Number of cards in the bag = 30 cards.

A card is drawn ar random from the bag.

Now, let us refer to the cards numbered from 1 to 30 which is a multiple of 3.

The multiples are : 3, 6, 9, 12, 15, 18, 21, 24, 27, 30.

Hence, there are 10 cards.

Hence, number of cards numbered 1 to 30 that are not a multiple of 30 : 30 - 10 = 20.

Hence, Favorable outcomes = 20.

Probability is said to be : Favorable outcomes/Tital number of outcomes.

Hence, the probability = 20/30 = 2/3.