Question

a tough probability question..

Answer 1

http://assets.openstudy.com/updates/attachments/4f931467e4b000ae9ec9d953-artofspeed-1335039088752-28.jpg

Answer 2

If you can't eat a green candy after eating a red candy, it's clear that after eating one red, you have to eat only red. So, it's the probability of eating 1G + 4R plus the probability of 2G + 3R plus the probability of 3G + 2R plus the probability of 4G + 1R plus the probability of 5G + 0R and all the G and R are sequential, i.e., it has to be 1G 1R and 1R and 1R and 1R and 1R for the first one. This may give you a hint to solving it :-)