Question

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

Answer 1

in many ways if in the 10 a student visa choose for exclusive Aarti Aarti they are one of them a friend of other they can join a day can take for the Aarti and other will take then the

Answer 2

I don't know what is the answer