SOLUTION: A student is to answer 10 out of 12 questions in an examination.
(a) How many choices she has?
(b) How many if she nust answer the first four questions
Algebra ->
Permutations
-> SOLUTION: A student is to answer 10 out of 12 questions in an examination.
(a) How many choices she has?
(b) How many if she nust answer the first four questions
Log On
Question 1071861: A student is to answer 10 out of 12 questions in an examination.
(a) How many choices she has?
(b) How many if she nust answer the first four questions Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! It is 12C10 which is 12*11/2=66 ways. (12!/10!2!)
If she must answer the first four questions then 8 are left to which she must answer 6
8C6=28 ways.
