The table gives information about the times, in minutes, taken by 80 customers to do their shopping in a supermarket. (a) Complete the cumulative frequency table. (1) (b) On the grid opposite, draw a cumulative frequency graph for your table. (2) One of the 80 customers is chosen at random. (d) Use your graph to find an estimate for the probability that the time taken by this customer was more than 42 minutes. .................................................. (2)

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