Maths doubts

Posted by Homer Simpson on May 27, 2014; 11:32am
URL: http://discussion-forum.276.s1.nabble.com/Maths-doubts-tp7590782.html

Please explain how to do these. Thank you :)

1) At the end of the day, a bakery gives everything that is unsold to food banks for the needy. If it has 12 apple pies left at the end of a given day, in how many different ways can it distribute these pies among six food banks for the needy? Also, in how many different ways can the bakery distribute the 12 apple pies if each of the six food banks is to receive at least one pie?

2) A carton of 15 light bulbs contains one that is defective. In how many ways can an inspector choose 3 of the bulbs and get

a) one that is defective 91
b) non-defective ones 364