A bag contains 20 tickets, numbered from 1 to 20. Two tickets are drawn without replacement. What is the probability that the first ticket has an even number and the second an odd number.

A bag contains 20 tickets numbered 1 to 20. Two tickets are drawn at random. Find the probability that both the numbers on the ticket are prime.

A bag contains 20 tickets numbered 1 to 20. Two tickets are drawn at random . Find the probability that both the numbers on the ticket are prime.

A box contains 10 tickets numbered from 1 to 10 . Two tickets are drawn one by one without replacement. The probability that the "difference between the first drawn ticket number and the second is not less than 4" is

A box contains 10 tickets numbered from 1 to 10 . Two tickets are drawn one by one without replacement. The probability that the "difference between the first drawn ticket number and the second is not less than 4" is

A box contains 10 tickets numbered from 1 to 10 . Two tickets are drawn one by one without replacement. The probability that the "difference between the first drawn ticket number and the second is not less than 4" is

A box contains 10 tickets numbered from 1 to 10. Two tickets are drawn one by one without replacement.The probability that the difference between the first drawn ticket number and the second is not less than 4 is.

A box contains 10 tickets numbered from 1 to 10 . Two tickets are drawn one by one without replacement. The probability that the "difference between the first drawn ticket number and the second is not less than 4" is

A bag contains 100 tickets numbered from 1 to 100. Four tickets are drawn successively with replacement from the bag. Find the probability that all the tickets bear even numbers.

A bag contains 17 tickets numbered from 1 to 17. A ticker is drawn without replacing the first one. The probability tha both the tickets may show even numbers is