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Basic Mathematics QUESTION #2815
Question 1
The average marks of 30 students is 65. If 5 more students with an average of 75 join the class, what is the new average?
  • 66.43
  • 66.67✔️
  • 67.14
  • 68
Correct Answer Explanation
Old total \(= 30 \times 65 = 1950\). New total \(= 1950 + 5 \times 75 = 1950 + 375 = 2325\). New average \(= \dfrac{2325}{35} = 66.43 \approx 66.43\). Exact: \(\dfrac{2325}{35} = 66.43\).