Math miscellaneousHard
Question
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. The number of ways in which this can be done is
Options
A.36
B.66
C.108
D.3
Solution
Total number of ways = 3C2 × 9C2
= 3 ×
= 3 × 36 = 108
= 3 ×
= 3 × 36 = 108Create a free account to view solution
View Solution FreeMore Math miscellaneous Questions
z and w are two non zero complex no.s such that |z| = |w| and Arg z + Arg w = π then z equals...The value of b for which the equations x2 + bx + 1 = 0, x2 + x + b = 0 have one root in common is :-...The system of equations αx + y + z = α - 1, x + αy + z = α - 1, x + y + αz = α - 1 has no ...How many real solutions does the equation. x7 + 14x5 + 16x3 + 30x - 560 = 0 have :-...Let P be the point (1,2,3) and Q be a point on the line . Then thevalue of λ for which line PQ is perpendicular to ...