Question Number 102101 by mathocean1 last updated on 06/Jul/20

We have 2 red and 1 black tokens.  We want to dispose them on 9 places  of this checker−board.  1)What the number of possibilities   to dispose these 3 tokens on these  9 places.  2)What it is the number of possibilities  to dispose these 3 tokens  like that:  a) one red token on one black place.  b)two red tokens on black places.  c)zero red token one black places.

Commented bymathocean1 last updated on 06/Jul/20

Answered by PRITHWISH SEN 2 last updated on 06/Jul/20

  1)C_3 ^9   2.  a)C_1 ^3 ×C_1 ^6 ×C_1 ^7   b)C_2 ^3 ×C_1 ^7   c)C_2 ^6 ×C_1 ^7