Mock Set 1 Paper 01 Non Calculator
Edexcel – foundation
Question 21:
\[ \begin{aligned} &\text{The mean length of 5 sticks is }4.2\text{ cm.} \\ &\text{Nawal measured the length of one of the sticks as }7\text{ cm.} \end{aligned} \]
(a) \begin{aligned} &\text{Work out the mean length of the other 4 sticks.} \\[5cm] \end{aligned} (3 marks)
(b) \begin{aligned} &\text{Nawal made a mistake. The stick was not }7\text{ cm long. It was }17\text{ cm long.} \\ &\text{How does this affect your answer to part (a)?} \\[5cm] \end{aligned} (1 mark)