In a class of 30 students the average score in ... - JSS1 Mathematics Statistics Question

In a class of 30 students, the average score in a test is 80. If 5 additional students join the class and their average score is 85, what is the new average score for the entire class?

First, find the total score for the initial 30 students: Total score for 30 students=30×80=2400

Next, find the total score for the 5 additional students: Total score for 5 students=5×85=425

Combine the total scores: Combined total score=2400+425=2825

Find the new average score for the entire class of 35 students: New average score=2825/35=80.71≈81

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