Question on: JSS1 Mathematics - Statistics
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?
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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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