Among the 36 teachers in a school, one principal and one vice-principal are to be appointed. In how many ways this can be done?
From among the 36 teachers in a school, one pricipal and one vice-principal are to be appointed. In how many ways can this be done ?
In a college there are 20 professors including the principal and the vice principal. A committee of 5 is to be formed. In how many ways it can be formed so that neither the principal nor the vice principal is included?