Question

If From A Lottery of 30 Tickets marked 1,2,3, .......,30; four tickets are drawn, what is the chance that those marked 29 and 30 are amongst them. [Probability Class 11]​

Answer 1

HEY MATE HERE IS YOUR ANSWER.....

Step-by-step explanation:

if you know permutation and combination, the answer is simple:

Of the four tickets, two have to be 1 and 2 and the other two can be any one of the other 28 tickets.

if order of tickets drawn is not important, favourable number of ways is 28 C 2.

if order is important, the favourable number of ways is 4! * 28 C 2.

For probability, divide the favourable number of ways by total number of ways of choosing 4 tickets, I.e. 30 P 2 or 30 C 2 depending on whether order is or isn't important