From a class of 25 students, 4 are to be chosen for a competition. In how many ways can this be done?

From a class of 32 students, 4 are to be chosen for a competition. In how many ways can this be done?

From a class of 32 students, 4 are to be chosen for a competition. In how many ways can this be done ?

From a class of 32 students,4 are to be chosen for a competition.In how many ways can this be done?

From a class of 30 student , 3 are to be chosen for a competition . In how many ways can this be done ?

From a class of 30 student , 3 are to be chosen for a competition . In how many ways can this be done ?

From a class of 25 students, 10 are to be chosen for an excursion party. There are 3 students who decide that either all of them will join or none of them will join. In how many ways can the excursion party be chosen ?

From a class of 25 students, 10 are to be chosen for an excursion party. There are 3 students who decide that either all of them will join or none of them will join. In how many ways can the excursion party be chosen ?

From a class of 25 students, 10 are to be chosen for an excursion party. There are 3 students who decide that either all of them will join or none of them will join. In how many ways can the excursion party be chosen ?

From a class of 25 students, 10 are to be chosen for an excursion party. There are 3 students who decide that either all of them will join or none of them will join. In how many ways can the excursion party be chosen ?