A bag contains tickets numbered from 1 to 30. Three tickets are drawn at random from the bag. Whatis the probability that themaximum no. of the selected tickets exceeds 25???
Let A be the event that none of the selected tickets bear number exceeding 25.
Then required probability
Now, total numbers of ways of drawing three tickets out of 30 is
∴ Total number of elementary event
and three tickets are drawn from tickets bearing number 1 to 25 can be done in ways
∴ Favourable number of elementary event