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**Question**

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11)

The grouped frequency table gives information about the times, in minutes, that 80 office workers take to get to work.

a) Complete the cumulative frequency table.

**[1 mark]**

b) On the grid, draw the cumulative frequency graph for this information.

**[2 marks]**

c) Use your graph to find an estimate for the percentage of these office workers who take more than 90 minutes to get to work.

**[3 marks]**