If 5 boys and 4 girls are arranged in a row at random then the probability of arranging so that same sex do not come to gether is

If 3 boys and 3 girls are arranged along a row at random. Find the probability that all the girls sit together.

4 boys and 4 girls are arranged in a row at random. Find the probability that the boys and girls sit alternatively.

If 5 boys and 5 girls sit in a row at random what is the prbability that no two of the same sex come together.

5 red balls and 4 black balls of different sizes are arranged in a row at random. The probability that no two balls of the same colour come together is

8 boys and 4 girls sit in a row at random. The probability that all the girls come together is

The letters of the word MISSISSIPI are arranged in a row at random . The probability that all S's come together is

7 boys and 3 girls sit in a row at random. The probability that no two girls come together is

5 boys and 3 girls sit in a row at random. The probability that no two girls sit together is