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Alligation & Mixtures · Question 72 of 88

Question 72

EasyOriginal question

Read the two statements and choose the correct option.

I. Each replacement takes away the same fraction of the original liquid that is still in the vessel.

II. After two replacements of 10% each, 20% of the original liquid is gone.

Options for question 72

Show the answer and explanation
CorrectNot quiteAnswer A

Correct answer: A

Explanation

  1. I: each draw takes the same share of whatever the vessel holds, so the original liquid is multiplied by the same factor each time. True.

  2. II: (0.9)2=0.81(0.9)^{2} = 0.81, so 19% is gone, not 20%: the second 10% is taken from less. False.

Concept
How replacement works
Typical time
60 s
Your time
—
The rule this testsRepeated replacement
Practise this chapter →

Ten questions from Alligation & Mixtures, at your own pace.

Practise this chapter →

Ten questions from Alligation & Mixtures, at your own pace.