There are n sweets in a bag. 6 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 H

The answer is a proof so is best shown during the interview via the whiteboard. For reference this question was in the news a few years ago and was considered difficult for GCSE students at the time.