The conundrum of Cheryl’s birthday stumped students in Singapore in April. Now thousands of GCSE maths students have vented their exam frustration on Twitter about a question on the probability of getting two orange sweets from a bag.
The pupils who all sat the Edexcel maths paper Wednesday morning took to the social networking site after being stumped by the probability question.
The question told pupils that Hannah had a bag containing a total of n sweets of which 6 were orange. It said the chances of Hannah picking two orange sweets one after the other was one third and then said use that to prove that n²-n-90=0.