COMEDK · Maths · 1. Basic of Mathematics
Ram obtained 60 and 85 in first two unit tests. The minimum marks he should get in the third test to have an average of atleast 55 marks is
- A \(x \geq 20\)
- B \(x \leq 20\)
- C \(x>20\)
- D \(x < 20\)
Answer & Solution
Correct Answer
(A) \(x \geq 20\)
Step-by-step Solution
Detailed explanation
To get an average of atleast 55 marks, We have, \(\frac{60+85+x}{3} \geq 55\) \(\Rightarrow \quad 145+x \geq 165\) \(\Rightarrow \quad x \geq 165-145\) \(\Rightarrow \quad x \geq 20\)
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