Question

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Answer 1

Answer:

the mean score is 72

Step-by-step explanation:

explanation is in the photo

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Answer 2

Step-by-step explanation:

Mean score of girls = 73

Mean score of boys = 71

Mean score of all class

=> Mean score of girls + Mean score of boys / 2

=> 73+71 / 2

=> 144/2 = 72

So,Mean Marks of class = 72.

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