There are n n\,n beads in a container.
5 of the beads are green and the rest are yellow.
Sarah takes a bead from the container at random and does not replace it. She then takes another bead at random from the container.
The probability that Sarah takes two yellow beads is 37\displaystyle \frac{3}{7}73
Show that 2n2−37n+105=02n^2 - 37n + 105 = 02n2−37n+105=0
Find the value of nnn.
Practise OCR GCSE Maths Probability Equation Questions with exam-style questions for Foundation and Higher tier. 28 questions, matched to the OCR GCSE Maths (J560) specification and written in the written papers 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.
