Q 49 plz explain 49.
50.
The number of shortest routes through the junction P .
(B) 216
(C) 560
The number of shortest routes which go following street PQ must be
(A ) 324
(B) 350
(C) 512
Passage
Consider all possible permutations of 6 identical red balls, 5 identical yellow balls
51.
52.
The number of permutations in which all blue balls together but no two
(A) 15C6.4!
(B) 128
The number of permutations in which all the blue balls are preceding th
14
