A has 3 shares in a lottery containing 3 prizes and 9 blanks, B has 2 shares in a lottery containing 2 prizes and 6 blanks. Compare their chances of success

A has 3 shares in a lottery containing 3 prizes and 9 blanks , B has two shares in lottery containing 2 prizes and 6 blanks , Copare their chances of success .

In a lottery there are 10 prizes and 25 blanks. What is the probability of getting a prize?

A lottery consists 3 prize tickets and 6 blank tickets. A choose three tickets from this lottery . Another lottery there are 1 prize ticket and 2 blank tickets. B choose one ticket from this lottery. Find the ratio in favour of A and B.

Two containers A and B have the same volume. Container A contains 5 moles of O_(2) gas. Container B contains 3 moles of He and 2 moles of N_(2) . Both the containers are separately kept in vacuum at the same temperature. Both the containers have very small orifices of the same area through which the gases leak out. Compare the rate of effusion of O_(2) with that of He gas mixture.

The term containing a^(3)b^(4) in the expansion of (a-2b)^(7) is

One purse (X) contains one white and three blue balls, another purse contains 2 white and 4 blue balls, and third purse (Z) contains 3 white and 1 blue balls. If a ball is drawn from one purse selected at random. Find the chance that it is white.

Find the chance of drawing 2 white balls in succession from a bag containing 5 red and 7 white balls, the ball first drawn not being replaced.

Find the chance of drawing 2 white balls in succession from a bag containing 5 red and 7 white balls, the ball first drawn not being replaced.

Compare the ratios : 3:11 and 2:9

A box B_(1) contains 1 white ball, 3 red balls, and 2 black balls. An- other box B_(2) contains 2 white balls, 3 red balls and 4 black balls. A third box B_(3) contains 3 white balls, 4 red balls, and 5 black balls. If 1 ball is drawn from each of the boxes B_(1),B_(2) and B_(3), the probability that all 3 drawn balls are of the same color is