There are 3 blue balls, 4 red balls and 5 green balls. In how many ways can they be arranged in a row?

A bag contains 9 yellow balls, 3 white balls and 4 red balls. In how many ways can two balls be drawn from the bag?

In how many ways can 3 red and 4 black balls be arranged in a row?

In how many ways can 3 red and 4 black balls be arranged in a row?

In a box there are 6 blue ball, X red balls & 10 green balls. Probability of choosing one red ball from the given box is 1/3, then find the sum of red and blue balls in the box?

The number of ways in which 4 different red balls and 8 similar green balls can be arranged in a row so that at most 3 red balls are together is equal to

The number of ways in which 4 different red balls and 8 similar green balls can be arranged in a row so that at most 3 red balls are together is equal to

In how many ways can 4 identical black balls , 5 identical red balls and 6 identical green balls be arranged in a row so that at least one ball is seperated from balls of the same colour ?

A bag contains 6 red and 5 blue balls. In how many ways can one choose 3 red and 2 blue balls from this bag?