Question

If the marks obtained by Tahir in Thermodynamics were increased by 24% of the original marks, then what would be his new approximate percentage in Thermodynamics, when the maximum marks were 140?

• A. 49%
• B. 53%
• C. 57%
• D. 41%

Hint:

When calculating percentage after a mark increase, always clarify whether the increase is in actual marks or in percentage. In exams, choose the closest matching option if exact match isn't available.

Answer 1

The Correct Option is D

Step 1: Identify Tahir's original marks in Thermodynamics.
From the table:
Tahir's marks in Thermodynamics = 50 \vspace{0.3cm} Step 2: Calculate 24% of Tahir's original marks.
$24%$ of $50 = \frac{24}{100} \times 50 = 12$ \vspace{0.3cm} Step 3: Add the increase to the original marks.
New marks $= 50 + 12 = 62$ \vspace{0.3cm} Step 4: Calculate the new percentage with maximum marks of 140.
Percentage $= \left(\frac{62}{140}\right) \times 100 = \frac{6200}{140} \approx 44.29%$ \vspace{0.3cm} Now compare with given options:
[6pt] % Option (A) 49% → too high
% Option (B) 53% → too high
% Option (C) 57% → too high
% Option (D) 41% → closest lower value \vspace{0.3cm} \[ \boxed{\text{(D) } 41%} \]