Aliterature course you are taking requires that you read 4 books during the semester from a reading list of 15 books. how many different groups of 4 can you select to read?

we have given that list of 15 books from that we need to choose 4 books.

we need to find how many different choices are made.

we know that formula is .

where n is the number of books and r is number of books chosen.

choices can be made.

amount of oatypop that contains the prize = 40%

amount   of oatypop which doesn't contain the prize = (100-40)=60%

probability that hannah will win a prize

    = s +f s +f f s+ff   f s+ff f f s+ infinity.where f= failure,s= success

=   or 60%

probability that hannah only has to buy 3 or less boxes before getting a prize= (s) and ( f s) and (ff s) and (f f f s)

        = = 87.04 %  

step-by-step explanation:

0.038

step-by-step explanation: