ANALOG ELECTRONICS QUIZ

The average weight of boys in a class is 30 kg and the average weight of girls in the same class is 20kg. If the average weight of the whole class is 23.25 kg, what could be the possible strength of boys and girls respectively in the same class?

None of these

14 and 16

17 and 27

13 and 27

TRUE ANSWER : ?
YOUR ANSWER : ?

In two types of brass, the ratios of Copper to Zinc are 8:3 and 15:7 respectively. If the two types of brass be melted and mixed in the ratio 5:2 a new type of brass is obtained. The ratio of Copper to Zinc in this new type of brass is

5:2

2:3

3:4

3:2

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YOUR ANSWER : ?

A beaker contains acid and water in the ratio 1 : x. When 300 ml of the mixture and 50 ml of water are mixed, the ratio of acid and water becomes 2 : 5. What is the value of x?

1

4

2

3

TRUE ANSWER : ?
YOUR ANSWER : ?

A sum of Rs. 41 was divided among 50 boys and girls. Each boy gets 90 paise and a girl 65 paise. The number of boys is ?

16

36

34

14

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YOUR ANSWER : ?

From a vessel filled with alcohol 1/5 of its contents is removed and the vessel is then filled up with water. If this be done 5 times in succession, what proportion of the alcohol originally contained in the vessel will have been removed from it?

1024 2101

1024 3125

2101 3125

None of these

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YOUR ANSWER : ?

Two vessels A and B contain mixture of milk and water in the ratio 4 : 1 and 9 : 11 respectively. They are mixed in the ratio of 3 : 2. Find the ratio of milk and water in the resulting mixture.

17 : 33

33 : 17

16 : 34

34 : 16

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In what proportion should water and wine at Rs. 22·50 a liter be mixed to reduce the price to Rs. 18 a liter?

2 : 3

4 : 1

3 : 2

1 : 4

TRUE ANSWER : ?
YOUR ANSWER : ?

If a man buys 1 lt of milk for Rs.12 and mixes it with 20% water and sells it for Rs.15, then what is the percentage of gain?

30%

25%

17%

19%

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YOUR ANSWER : ?

The cost of type - I rice is Rs. 15 per kg and type - II is Rs. 20 per kg. If both type - I and type - II are mixed in the ratio of 2 : 3, then find the price per kg of the mixed variety.

18.50

19.50

18

19

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YOUR ANSWER : ?

A vessel is filled with liquid, 3 parts of which are water and 5 parts of syrup. How much of the mixture must be drawn off and replaced with water so that the mixture may be half water and half syrup?

1/7

1/4

1/3

1/5

TRUE ANSWER : ?
YOUR ANSWER : ?

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