There is a national exam taken by all students in British high schools known as the GCSE exam and apparently one recent problem has caused an uproar because it stumped most students. Here it is:
Hannah has 6 orange sweets and some yellow sweets.
Overall, she has n sweets.
The probability of her taking 2 orange sweets is 1/3.
Prove that: n^2-n-90=0
^ is “to the power of”
The problem seems pretty straightforward to me and should be doable by anyone who has been taught the elements of probability (the link above gives the solution) and so I am puzzled by fact that there has been a lot of fuss over it.
Apparently it is the wording of the question that is at issue, especially the use of the word ‘prove’, but I am unsure as to how one would interpret the above wording in such a way as to be confused as to what is expected.