Question

Ticket numbered form 1 to 20 are mixed up together and then a ticket is drawn at random. What is the probability that the ticket drawn has a number which is a multiple of 3 or 7 ?

Answer 1

Solution:




Probability ✒ Probability is the measure of something which can be happen.


Probability = Number of Outcomes/Total Number of Outcomes

In this Question, it is given that Ticket numbered form 1 to 20 are mixed up together and then a ticket is drawn at random.

Total Number of Outcomes = 20


Possibility of Outcomes = { 1, 2, 3............, 20)


Multiple Number of 3 or 7 = { 3,6,9,12,15,18 ,5,10,15,20}

Let E be event of getting probability of Number


P(E) = Number of Outcomes / Total Number of Outcomes


P(E) = 9/20


Hence, Required Probability of the ticket drawn has a number is 9/20.