# IKMC Confusion: Marbles in a Bag question

### IKMC Confusion: Marbles in a Bag question

A bag contains only red and green marbles. For any 5 marbles we pick, at least one is red. For any 6 marbles we pick, at least one is green. What is the largest number of marbles the bag can contain?
A 11
B 10
C 9
D 8
E 7

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### Re: IKMC Confusion: Marbles in a Bag question

9 balls , 5 Red + 4 Green balls

invinciblelokesh

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### Re: IKMC Confusion: Benjamin Paper 2017 Q29

Julia has four different coloured pencils and wants to use some or all of them to paint a map of an island divided into four nations. The map of two nations with a common border cannot have the same colour. In how many ways can she colour the map of the map?