Elitmus Exam

Find the no of ways in which you can fill 3*3 grid(with 4 corners defined as a,b,c,d) if you have 3 white marbles and 6 black marbles.
A)9C3
B)5C3
C)9C3+6C3
D)(9C3+5C3)/3!

Read Solution (Total 3)

9C3

Among 9 holes,3 holes are selected for white marbles or 6 holes for black marbles.
=> 9C6 or 9C3
11 years agoHelpfull: Yes(7) No(1)

9c3*6c6=9c3
10 years agoHelpfull: Yes(4) No(0)
9!/(6!*3!) = 84=9C3
8 years agoHelpfull: Yes(0) No(0)

Elitmus Other Question

How many values of c in the equation will result in rational roots which are integers?
A)1
B)3
C)6
D)infinite Heinz produce tomato pure by boiling tomato juice.The tomato pure has only 20% water while the tomato juice has 90% water.How many litres of tomato pure can be obtained by 20 litres of tomato juice.
A)2
B)2.4
C)2.5
D)6