The owner of three driving schools, A, B and C, wished to assess whether there was an association between passing the driving test and the school attended. He selected a random sample of learner driven from each of his schools and recorded the numbers of passes and failures at each school. The results that he obtained are shown in the table below.

Using a χ²-test and a 5% level of significance, test whether there is an association between passing or failing the driving test and the driving school attended.

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Driving school attended A B C Passes 23 15 17 Failures 27 25 43