Sum

Tickets numbered 1 to 20 are mixed up and then a ticket is drawn at random. What is the probability that the ticket drawn bears a number which is a multiple of 3?

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#### Solution

Tickets are marked from 1 to 20 are mixed up. One ticket is picked at random.

TO FIND: Probability that the ticket bears a multiple of 3

Total number of cards is 20

Cards marked multiple of 3 number are 3,6,9,12,15,18

Total number of cards marked multiple of 3 are 6

`"We know that PROBABILITY" =" Number of favourablr event"/"Total number of event"`

`"Hence probability of getting a multiple of 3 on the ticket "=6/20=3/10`

`"Hence probability of getting a multiple of 3 on the ticket "3/10`

Concept: Basic Ideas of Probability

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