Question

Piyush's marks in mathematics were wrongly read as 65 instead of 85. What is the percentage error in the marks?
Please do Answer​

Answer 1

Step-by-step explanation:

PERCENTAGE ERROR=ERROR/ACTUAL VALUE *100

First we calculate the error by subtracting one value from  the other.

85 - 65 = 20

Now divide the value by the exact value, and multiply by 100 to find the value in percentage.

Percentage error  = 20/85*100

= 23.5294

=23.53%

∴THE % ERROR IN THE MARKS IS 23.53%

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Answer 2

Answer:-

$\sf{23.52\% \ error \ was \ their \ in \ marks.}$

Given:

• Piyush's marks in mathematics were wrongly read as 65 instead of 85.

To find:

• The percentage error in the marks.

Solution:

$\sf{Error \ of \ marks=Real \ marks-Wrong \ marks}$

$\sf{\therefore{Error \ of \ marks=85-65}}$

$\sf{\therefore{Error \ of \ marks=20}}$

$\sf{Let \ the \ percentage \ of \ error \ in \ the \ marks}$

$\sf{be \ x\%.}$

$\sf{\therefore{x=\frac{20}{85}\times100}}$

$\sf{\therefore{x=0.2352\times100(approx)}}$

$\sf{\therefore{x=23.52\%(approx)}}$

$\sf\purple{\tt{\therefore{23.52\% \ error \ was \ their \ in \ marks.}}}$