1.

If 7 white, 6 black and 1 red ball is arranged in a row, the probabilitythe no two balls of the same colour are adjacent is :

Answer»

`(2xx7!6!)/(14!)`
`(14xx7!xx6!)/(14!)`
`(26xx7!xx6!)/(14!)`
`(7!xx7!)/(14!)`

SOLUTION :Arrange 1 RED and 7 white balls and COUNT


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