A jar contains some apple-flavored sweets and some orange-flavored sweets.
The ratio of apple sweets to orange sweets is 5:15:15:1.
Sarah takes two sweets from the jar at random.
The probability that Sarah takes two apple sweets is 1522\displaystyle \frac{15}{22}2215.
Work out how many orange sweets are in the jar.
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.