Any problems with the homework year 7, send me a comment here and I'll post some clues!

OK, I've had a request about question 3, it's quite a tough one and requires a lot of imagination.

Imagine a bag with red and blue marbles in it. We know that the probability of taking a blue one is one quarter, so........

there could be red red red blue

or

red red red blue
red red red blue

or

red red red blue
red red red blue
red red red blue

and so on. So consider this when you are imagining taking the marbles out!