The students in Class A and in Class B take the same examination. There are 28 students in Class A and 32 students in Class B. The mean score for all the students in both classes is 72.6 The mean score for the students in Class A is 75 (a) Work out the mean score for the students in Class B. (4) The lowest score in Class A is 39 The range of scores for Class $$\(\mathrm{A}\)$$ is 57 The lowest score in Class B is 33 The range of scores for Class B is 60 (b) Find the range of scores for all the students in both classes. (3)

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