Question
A girl found the answer for the question “subtract
the sum 1/2 and 1/8 from unity and express the answer in decimals” as 1.5. The percentage of error in her answer was?Solution
Correct answer = 1 - (1/2+1/8) = 1 - ((4+1)/8) ⇒ 1 - 5/8 = 3/8 = 0.375 Difference in answer = 1.5 - 0.375 = 1.125 Required percentage = 1.125/0.375 × 100 = 300 %
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(ii) MnO₂ + 4HCl → MnCl₂ + 2H₂ O + Cl₂
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Consider the following pairs of Committees of the Constituent Assembly and their Chairman:
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If a : b = 2 : 3 and b : c = 3 : 4, then a : b : c = ?
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