Five crosses are to be put into eleven square blocks written in the form of an E as shown in figure so that every row has a cross. In how many different ways can it be done?

Six X's are to be placed in boxes of the figure such that each row contains at least one X , In how many different ways can this be done?

In how many different ways 5 girls can be seated in a row?

Six X 's have to be placed in the squares of the figure below, such that each row contains atleast one X. in how many different ways can this be done?

Five boy and five girls sit alternately around a round table.In how many ways can this be done?

4 boys and 2 girls are to be seated in a row in such a way that the two girls are always together. In how many different ways can they be seated?

There are three different rings to be worn in four fingers with at most one in each finger. In how many ways can this be done?

Each of 8 identical balls is to be placed in the squares shown in the figure given in a horizontal direction such that one horizontal row contains 6 balls and the other horizontal row contains 2 balls. In how many maximum different ways can this be done