PK 2017 Q5
5. Martina plays chess. She has played 15 games this season, out of which she has won nine. She has five more games to play. What will her success rate be in this season if she wins all five remaining games?
- A 60%
- B 65%
- C 70%
- D 75%
- E 80%
Pink Kangaroo 2017, Question 5. © UK Mathematics Trust. Original paper on ukmt.org.uk
Answer: C 70%
If she wins five more games, then she will have won 14 out of 20, which is equivalent to \(\tfrac{7}{10}\) or 70%.
Solution © UK Mathematics Trust, from the PK 2017 solutions.