Directions: The following table shows the number of magazines sold by the four different persons A, B, C and D in three different years 2010, 2011 and 2012.
Name of persons Number of magazine sold in 2010 Number of magazine sold in 2011 Number of magazine sold in 2012
A 20 18 12
B 16 24 15
C 30 14 21
D 25 15 10
If the number of magazines sold by person A in 2010 is increased by x% then the total number of magazines sold by person A in all the three years is 55. Find the value of x.
This questions was previously asked in
RRB Clerk Prelims (19 Aug, 2023 Shift 1)
Explanation:
- Let's evaluate the problem step-by-step.
- In 2010, person A sold 20 magazines.
- An increase by \(x\%\) in 2010 should make A's total sales over the three years equal 55 when added with 2011 and 2012 sales.
- The formula to calculate the increased sales in 2010 is: \(20 + \dfrac{x}{100} \times 20\)
- Hence, the total for three years should be: \((20 + \dfrac{x}{100} \times 20) + 18 + 12 = 55\)
- This simplifies to \(50 + 0.2x = 55\)
- Solving: \(0.2x = 5\), thus \(x = 25\%\).
Correct Answer: Option:3, 25%
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By: Parvesh Mehta