Two barrels contain a mixture of ethanol and gasoline. The content of the ethanol is 60% in the first barrel and 30% in the second barrel. In what ratio must the mixtures from the first and the second barrels be taken to form a mixture containing 50% ethanol ?

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Two barrels contain a mixture of ethanol and gasoline. The content of the ethanol is 60% in the first barrel and 30% in the second barrel. In what ratio must the mixtures from the first and the second barrels be taken to form a mixture containing 50% ethanol ?

A1 : 2

B2 : 1

C2 : 3

D3 : 2

Nithin ? undefined

Correct answer is: 2 : 1

Explanation:

By allegation,
Mixture-I Mixture-II
Therefore, Required ratio
\(= \frac{1}{5}:\frac{1}{10}\)

\(= 2:1\)

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Prof. Chatteijee bought a car and got 15% of its original price as a dealer's discount. He then sold it at 20% profit on his purchase price. What percentage profit did he get on the original price?

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Prof. Chatteijee bought a car and got 15% of its original price as a dealer's discount. He then sold it at 20% profit on his purchase price. What percentage profit did he get on the original price?

A$\text{2%}$

B$\text{12%}$

C$\text{5%}$

D$\text{17%}$

Nithin ? Aug 10 '2022 at 21:43

Correct answer is: \(\text{2%}\)

Explanation:

Gain percent

\(=\Large \left(20 - 15 - \frac{20 \times 15}{100}\right)\text{%}\)

\(\text{= 2%}\)

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The currencies in countries M and N are denoted by m and n respectively. The exchange rate in 1990 was lm. 0.6n the price level in 2006 in M and N are 150 and 400 respectively with 1990 as a base of 100. The exchange rate in 2006 based solely on the purchasing power parity consideration is 1 m :

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The currencies in countries M and N are denoted by m and n respectively. The exchange rate in 1990 was lm. 0.6n the price level in 2006 in M and N are 150 and 400 respectively with 1990 as a base of 100. The exchange rate in 2006 based solely on the purchasing power parity consideration is 1 m :

A0.225 n

B0.625 n

C1.6 n

D3.6 n

Nithin ? Aug 10 '2022 at 21:18

Correct anser is: 0.225 n

Explanation:

\(\Large \frac{1m}{150}=\frac{0.6n}{400}\)

\(\implies 1m = \Large \frac{0.6}{400} \times 150n = \text{2%}\)

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The average of marks obtained in 120 students was 35. If the average of passed candidates was 39 and that of failed candi- dates is 15, the number of candidates who passed the examination is:

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The average of marks obtained in 120 students was 35. If the average of passed candidates was 39 and that of failed candi- dates is 15, the number of candidates who passed the examination is:

A100

B110

C120

D80

Akilesh Kharvi ? Jun 28 '2020 at 21:34

Correct answer is: 100

Explanation:

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The age of Mr. Bhagat in 2002 was 1 /90 of his birth year. What is his age in 2006 ?

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The age of Mr. Bhagat in 2002 was 1 /90 of his birth year. What is his age in 2006 ?

A30

B28

C26

D22

Akilesh Kharvi ? Jun 28 '2020 at 21:31

Correct answer is: 26

Explantion:

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