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The following table shows the number ...

The following table shows the number of working hours and the number of employees employed in a small scale industry. No. of working hours                                             No. of employees 3 – 5                                         7 5 – 7                                               10 7 – 9                                               18 9 – 11                                               57 11 – 13                                               14 13 – 15                                     8 The average number of working hours of an employee is (a) 8.5       (b) 9.5      (c) 10.5      (d) None of these

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