There are n n\,n pens in a box.
6 of the pens are black and the rest are blue.
Maria takes a pen from the box at random and does not put it back. She then takes another pen at random from the box.
The probability that Maria takes two blue pens is 413\displaystyle \frac{4}{13}134
Show that 3n2−55n+182=03n^2 - 55n + 182 = 03n2−55n+182=0
Find the value of nnn.
Practise Edexcel GCSE Maths Probability Equation Questions with exam-style questions for Foundation and Higher tier. 28 questions, matched to the Edexcel GCSE Maths (1MA1) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.