There are two urns. Urn $A$ has 3 distinct red balls and urn $B$ has 9 distinct blue balls. From each urn two balls are taken out at random and then transferred to the other. Then number of ways in which this can be done, is

Question

Dr. Abubacker · Accepted Answer

(d)
[image:7_image3.emf]
The number of ways in which two balls form urn $A$ and two balls from urn $B$ can be selected
$= \ ^{3}C_{2} 	imes \ ^{9}C_{2} = 3 	imes 36 = 108$

Q. There are two urns. Urn $A$ has 3 distinct red balls and urn $B$ has 9 distinct blue balls. From each urn two balls are taken out at random and then transferred to the other. Then number of ways in which this can be done, is

Explanation

Reviewed by Dr. Abubacker

Want more practice?