Answer : This is a case of combination: Here,
n=25
r=4
⇒ nCr= 25C4
⇒25C4=12650 possible ways.
Ans: In 12650 ways, from a class of 25 students, 4 can be chosen for a competition.
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 25 students, 4 are to be chosen for a competition. In how many ways can this be done?