There are 25 students in the class. How many ways are there to fill the first row of seats? How many ways are there for the students to fill all the seats, if there are 25 students and 25...

There are 25 students in the class. How many ways are there to fill the first row of seats? How many ways are there for the students to fill all the seats, if there are 25 students and 25...

i have no idea what kind of topic this is and i don't know how to work it out.

A race has 125 Participants, in how many ways can the runners come in 1st, 2nd and 3rd place?

Is That is true: once you learn the rule of factorization it will remain utilize life time with out any queries ??

Ms. Lee's class is having a spelling contest. There are 4 finalists in the contest. How many different ways can the 4 students be seated on the stage?

On an English test, Jeff must write an essay for three of six questions in Part 1, and two of five questions in Part 2. How many different combinations of questions can be chosen?

A boy owns 6 pairs of pants, 4 shirts, 4 ties, and 8 jackets. How many different outfits can he wear to school if he must wear one of each item?

Simplify the expression (4n+3)!/(4n-3)!

how to do a bigger number

just solve it

how i can proof this equation (((-1)^n)(n!))/(x+n)! = ((-1)^n)(x-1)^(n+1) from left to right in Properties of the factorial??

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