Three married couples sit in a row. Find the probability that no husband sits with his wife.

For a party 7 guests are invited by a husband and his wife. They sit in a row for dinner. The probability that the husband and his wife sit together, is

For a party 7 guests are invited by a husband and his wife. They sit in a row for dinner. The probability that the husband and his wife sit together, is

For a party 7 guests are invited by a husband and wife. They sit in a row for dinner. The probability that the husband and his wife sit together, is

4 girls and 4 boys sit in a row. Find the probability the boys and girls sit in alternate seats.

Six boys and six girls sit in a row at random. Find the probability that : the boys and girls sit alternately.

5 boys and 5 girls sit in a row randomly. Find the probability that all the boys sit together.

4 girls and 4 boys sit in a row. Find the probability that the four girls are together