Counters marked 1, 2, 3 are placed in a bag, and one is with-drawn and replaced. The operation being repeated three times, what is the chance of obtaining a total of 6?

Counters marked 1,2,3 are placed in a bag, and one is with-drawn and replaced.The operation being repeated three xx,what is the chance of obtaining a total of 6?

Four tickets marked 00, 01, 10, 11 respectively are placed in a bag. A ticket is drawn at random five times being replaced each time. Find the Probability that the sum of the the numbers on tickets thus drawn is 23.

Four tickets marked 00, 01, 10 , 11 respectively are placed in a bag. A ticket is drawn at random five times being replaced each time. The probability that the sum of the numbers on the tickets is 22 is

Four tickets marked 00,01,10,11 respectively are placed in a bag.A ticket is drawn at random five xx being replaced each time.Find the Probability that the sum of the the numbers on tickets thus drawn is 23.

Four tickets are marked 00, 01, 10 and 11 respectively, are placed in a bag. A ticket is drawn at random five times, being replaced each time. The probability that the sum of the numbers on the five tickets drawn is 24, is

Out of 21 ticket marked 1,2….21 , three are drawn at random without replacement . The probability that these numbers are in A.P is :

If 12 tickets numbered 0,1,2,...11 are placed in a bag,and three are drawn out,then the chance that the sum of the numbers on them is equal to 12 is -

A bag contains 4 what and 6 black balls. A ball is drawn at random and replaced and then again a ball is drawn. If this is replaced 4 times, what is the probability that three black and one white ball will be drawn in these 4 trials ?