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Quantitative Aptitude
mediumQ. No. 6774-a-student-scores-45-percent-marks-out-of-347-how-many-marks-did-the-student-obtain

A student scores 45 percent marks out of 347. How many marks did the student obtain?

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The percentage expression “A student scores 45 percent marks out of 347. How many marks did the student obtain” is evaluated with Obtained marks = percentage × total marks ÷ 100., producing 156.15 as the option-specific result.

A80.15
B48.15
C106.15
D156.15
Correct Answer: 156.15Your Answer: D

Explanation

Solving “A student scores 45 percent marks out of 347. How many marks did the student obtain” requires the relationship Obtained marks = percentage × total marks ÷ 100.; substituting the stated quantities gives 45 × 347 ÷ 100 = 156.15 marks.; hence 156.15 is the calculated result and option D is correct.

Important Notes

  • Method for “A student scores 45 percent marks out of 347. How many marks did the student obtain”: use Obtained marks = percentage × total marks ÷ 100..
  • Substitution for “A student scores 45 percent marks out of 347. How many marks did the student obtain” produces 45 × 347 ÷ 100 = 156.15 marks..
  • Calculated answer for “A student scores 45 percent marks out of 347. How many marks did the student obtain” is 156.15, matching option D.
  • Verification for “A student scores 45 percent marks out of 347. How many marks did the student obtain”: retain the stated base quantity throughout the percentage calculation.

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Common questions and clear answers for this topic.

A student scores 45% marks out of 347. How many marks did the student obtain?

The answer is 156.15. Using Obtained marks = percentage × total marks ÷ 100, 45 × 347 ÷ 100 = 156.15 marks.

Which formula is used?

Obtained marks = percentage × total marks ÷ 100

What is Percentage and how is it used in competitive exam problems?

Percentage means per hundred and is used to express a number as a fraction of 100. Formula: Percentage = (Value/Total Value) x 100. In competitive exams like SSC CGL, IBPS Bank PO, and CAT, percentage questions appear as: finding percentage of a number, percentage increase/decrease, percentage change, successive percentage change, and percentage in Data Interpretation.

What are the important percentage-fraction equivalents to memorize?

Important percentage-fraction equivalents: 10% = 1/10, 12.5% = 1/8, 16.67% = 1/6, 20% = 1/5, 25% = 1/4, 33.33% = 1/3, 37.5% = 3/8, 50% = 1/2, 62.5% = 5/8, 66.67% = 2/3, 75% = 3/4. Converting percentages to fractions makes calculations faster. For example: 25% of 480 = 480/4 = 120. Memorizing these fractions is essential for quick Quantitative Aptitude calculations.

How to calculate Percentage Increase and Decrease?

Percentage Increase = (Increase/Original Value) x 100. Percentage Decrease = (Decrease/Original Value) x 100. If price increases by x% then decreases by x%, net effect is a decrease of x squared/100 percent. For Successive Percentage Changes: if first change is a% and second is b%, overall change = a + b + (ab/100) percent. This formula is crucial for profit/loss and interest problems in competitive exams.

How to solve population growth problems using percentage?

Population problems use percentage increase formula. If population is P and annual growth rate is r%, then after n years: Population = P x (1 + r/100)^n. Example: Town population 50,000 grows at 10% per year. After 2 years = 50000 x 1.1 x 1.1 = 60,500. If growth rate decreases, use (1-r/100). These problems appear in SSC CGL, IBPS, and banking exams.

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