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Basic Mathematics QUESTION #4575
Question 1
Average of $5, 10, 15$ is $A$. If $20$ is added, what is the new average?
  • $10$
  • $12.5$✔️
  • $15$
  • $A + 20$
Correct Answer Explanation
Old average = $\frac{5+10+15}{3} = 10$. New average = $\frac{5+10+15+20}{4} = \frac{50}{4} = 12.5$