Question 1123930
Now we know that at least one of the ones Ms.Quinn eats has coconut.
number of possible cases:
1 coconut:3c1*5c2/=30
2 coconut:3c2*5c1=15
3 cocolut:3c3=1.
overall: 30+15+1=46.

P(1 chocolate)=30/46=15/23.

Hope this solves your problem. This is the basic approach towards such problems.
Tip: When doing combinations, BE VERY CAREfUL NOT TO DOUBLE COUNT ANY CASE.


If you're stuck(like with 2 methods both of which seem right but to different results), a quick way out is to list all the cases possible. This can 100% help you spot your problem and avoid it next time.