Six X ' s have to be placed in thesquares of the figure below, such that each rowcontains atleast one X. In how many different wayscan this be done?

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?

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?

Six X have to be placed in the squares of figure such that each row contains at least one X. The number of ways in which this can be done is:

In how many ways can 7 cross marks X be placed in the given figure so that each row has at least one cross mark?

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

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?