A student multiplied a number by 3/5 instead of 5/3. what is the percentage error in the calculation?
a. 34%
b. 44%
c. 54%
d. 64%
Answers
Answered by
2
Answer : Option d
Explanation :
Let the number = 1
Then, ideally he should have multiplied 1 by 5/3.
Hence the correct result was 1 x (5/3) = (5/3)
By mistake, he multiplied 1 by 3/5.
Hence the result with the error = 1 x (3/5) = (3/5)
Error = 53−35=25−915=1615percentage error = ErrorTrue Value×100=(1615)(53)×100=16×3×10015×5=16×1005×5=16×4=64%
Explanation :
Let the number = 1
Then, ideally he should have multiplied 1 by 5/3.
Hence the correct result was 1 x (5/3) = (5/3)
By mistake, he multiplied 1 by 3/5.
Hence the result with the error = 1 x (3/5) = (3/5)
Error = 53−35=25−915=1615percentage error = ErrorTrue Value×100=(1615)(53)×100=16×3×10015×5=16×1005×5=16×4=64%
Similar questions