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Earn 100

In a bag, there are 150 coins of 150 p and 25 p denominations. If the total value of coins is 150, then find how many rupees can be constituted by 50 p coins.                                                                  

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Important Questions on Average

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What is the average of the first seven natural number multiples of 11?
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The age of two friends Aman and Baman is in the ratio 1:2. After 5 years, the ratio of their ages will become 3:5. Find the average of their ages after 10 years.
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If we take four numbers, the average of the first three is 20 and that of the last three is 10. If the first number is 20, the last number is
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Sachin has a batting average of 40 runs per innings in 15 ODIs. It was found that in the 2 ODI match series against South Africa(which were part of his first 15 ODIs), his average score was 40 and not 80. His correct average is 
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The average of temperatures at noontime from Monday to Friday is 40, the lowest one is 35. What is the possible maximum temperature at noontime on any of these days?
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The average age of a family of 3 members is 30 years. If the age of the youngest member is 5 years, then what was the average age of the family immediately prior to the birth of the youngest member?
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The average of 50 numbers is zero. Of them, at the most, how many may be greater than zero?
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The average of 40 numbers is 25. If two numbers namely 40 and 50 are discarded, the average of the remaining numbers is