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One-fifth of the certain journey is covered at the rate of 20 Km/h, one-fourth at the rate of 50 Km/h, and the rest at 55 Km/h. Find the average speed for the whole journey.

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Important Questions on Average

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A batsman makes a score of 40 runs in the 5th innings and thus increases his average by 4. Find the possible value of the new average.
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Aman can type a sheet in 10 minutes, Baman in 20 minutes and Chaman in 30 minutes. The average numbers of sheet typed per hour per typist for all three typist is.
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Find the average increase rate (per annum) if the increase in the population in the first year is 10% and that in the second year is 20%.
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The average income of a person for the first 5 days of a month is  20, for the next 10 day s it is  24 for the next 10 days it it  30 and for the remaining days of the month, it is  10. Find the average income (in ) per day.
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IMPORTANT
In hotel clarks, rooms are numbered from 101 to 150 on the first floor, 201 to 240 on the second floor and 316 to 355 on the third floor. In the month of May 2018, the room occupancy was 50% on the first floor, 50% on the second floor and 30% on the third floor. If it is also known that the room charges are  2000 1000 and  1500 on each of the floors, then find the average income per room (in ) for the month May 2017.
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IMPORTANT

A salesman gets a bonus according to the following structure:

If he sells articles worthx then he gets a bonus x10-1000. In the month of January, the value of his sales was 10000, in February it was 12000, from March to November it was 30000 for every month and December it was 12000. Apart from this, he also receives a basic salary of 3000 per month from his employer. Find his average income per month (in ) during the year.

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IMPORTANT
The average of 61 results is 43. If the average of the first 48 results is 36  and that of the last 12 is 49. Find the 49th result.
MEDIUM
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IMPORTANT
A man covers half of his journey by train 50 km/hr, half of the remainder by bus at 25 km/hr, and the rest by cycle at 5 km/hr. Find the average speed during the entire journey.