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

Question

Philoid · Accepted Answer

This is a case of combination:

Here,

n=25

r=4

⇒ ⁿC_r= ²⁵C₄

⇒²⁵C₄=

⇒²⁵C₄=12650 possible ways.

Ans:In 12650 ways ,from a class of 25 students, 4 can be chosen for a competition.