#### alanofcleeves

##### Member

"

*There are n sweets in a bag. Six of the sweets are orange. The rest of the sweets are yellow. Hannah takes a random sweet from the bag. She eats the sweet. Hannah then takes at random another sweet from the bag. She eats the sweet. The probability that Hannah eats two orange sweets is 1/3. Show that n²-n-90=0.*"

I remember being pretty unimpressed. I'm sure my peer group could have answered it by age 12-13. I didn't shine at maths and hadn't looked at a text book in 50 years but still solved it in under a couple of minutes.