Question

9. Piyush's marks in Mathematics were wrongly read as 65 instead of 85. What is the percentage error in
the marks?​

Answer 1

$\rule{400}4$

☆ ANSWER:-

▪︎ Given:-

• Piyush's marks read wrongly as 65.

• Correct marks he had got = 85.

▪︎ To Find:-

• The percentage of error.

$\rule{400}2$

▪︎ So, Firstly,

• Before finding the percentage of error let us first find out the error of marks he had got:-

$\sf = 85 - 65 \\ \\ \sf = 20$

▪︎ So he had got an error of 20 marks.

$\rule{400}2$

▪︎ Therefore,

• Percentage Of Error,

$= \sf\frac{20}{85} \times 100 \\ \\ \sf = \frac{2000}{85} \\ \\\sf = 23.52 \: percent \: (approx)$

$\therefore$ The error is of 23.52 or 23.5 percent.

$\rule{400}4$

Answer 2

Piyush read wrongly=65

instead of=84

difference between the numbers=85-65=20

20 ×100

85

400

17

so the percentage erron in the Mark's is

19

23-----

17

SUBSCRIBE TO GODSON 112 ONLY ON YOU TUBE