The cost of printing photos (C C\,C pence) is directly proportional to the number of photos printed (nnn).
C C\,C is given by the formula: C=12nC = 12nC=12n
Find the number of photos printed if the total cost is 156 pence.
Practise OCR GCSE Maths Direct and Inverse Proportion with exam-style questions for Foundation and Higher tier. 96 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.