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In a class with a certain number of students, if one new student weighing 50 kg is added, then the average weight of the class increased by  1 kg. If one more student weighing 50 kg is added, then the average weight of the class increases by 1.5 kg over the original average. What is the original weight (in kg) of the class?

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Important Questions on Simplification and Approximation

MEDIUM
Elementary Mathematics>Arithmetic>Simplification and Approximation>Simplification
The average of three numbers is 58. First number is 34th of third number. If the third number is 24 more than the second number,  what will be the difference between first and the second number?
HARD
Elementary Mathematics>Arithmetic>Simplification and Approximation>Simplification
The average weight of 25 objects is 50 kg. If the weight of another object X is added to it then the average weight increases by 500 g. What is the weight of X?
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Elementary Mathematics>Arithmetic>Simplification and Approximation>Simplification
Out of the five subjects, the average marks of Suman in the first 3 subjects were 81 and the average marks in the last 3 subjects were 74. If her marks in the third subject were 65, then what were her average marks in all the subjects?
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Elementary Mathematics>Arithmetic>Simplification and Approximation>Simplification
The average height of A, B and C is 148 cm. If the average height of A and B is 136 cm and that of B and C is 125 cm, then what is the height (in cm.) of B?
EASY
Elementary Mathematics>Arithmetic>Simplification and Approximation>Simplification
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Elementary Mathematics>Arithmetic>Simplification and Approximation>Simplification
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Elementary Mathematics>Arithmetic>Simplification and Approximation>Simplification
The average of the scores of 18 boys in a test is 16, while the average of the total 30 students in the class is 18.1. What is the average score of the girls?
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Elementary Mathematics>Arithmetic>Simplification and Approximation>Simplification
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Elementary Mathematics>Arithmetic>Simplification and Approximation>Simplification
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MEDIUM
Elementary Mathematics>Arithmetic>Simplification and Approximation>Simplification
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EASY
Elementary Mathematics>Arithmetic>Simplification and Approximation>Simplification

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MEDIUM
Elementary Mathematics>Arithmetic>Simplification and Approximation>Simplification

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MEDIUM
Elementary Mathematics>Arithmetic>Simplification and Approximation>Simplification
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MEDIUM
Elementary Mathematics>Arithmetic>Simplification and Approximation>Simplification
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Elementary Mathematics>Arithmetic>Simplification and Approximation>Simplification
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Elementary Mathematics>Arithmetic>Simplification and Approximation>Simplification
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MEDIUM
Elementary Mathematics>Arithmetic>Simplification and Approximation>Simplification
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MEDIUM
Elementary Mathematics>Arithmetic>Simplification and Approximation>Simplification

An object travels 20 meters in 4 seconds and 15 meters in the next two seconds. What is the average speed of the object?

EASY
Elementary Mathematics>Arithmetic>Simplification and Approximation>Simplification
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EASY
Elementary Mathematics>Arithmetic>Simplification and Approximation>Simplification
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