Forming a 6-member K-pop group from 20 Korean applicants.

Setting a password using the number 2, 4, 6, and 8.

Selecting four students out of 40 students to solve the same problem on the board.

Choosing 3 toppings for your sundae out of a list of 15.

Assembling a jigsaw puzzle.

Picking 6 balls from a basket of 12 balls.

Determining the top three winners in a Mathematics Quiz Bee.

Posing for a class picture.

Choosing three of your classmates to attend your party.

How many four-digit numbers can be formed from the numbers 1, 2, 3, 4 and 5 if repetition of digits is not allowed?

In how many ways can you place 7 different books on a shelf if there is space enough for only 5 books?

Ms. Gonzales needs to select five students who will join a Quiz Bee in AP. She has 50 students in her class. In how many ways can this be done, assuming that all of her students are good in AP?

From a standard deck of 52 cards, how many ways can 5 cards be drawn?

A box contains 3 red, 4 blue and 3 yellow marbles. How many ways can 4 balls be selected?