The average of five different positive numbers is 25. x is the decrease in the average when the smallest number among them is replaced by 0. What can be said about x?
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The average temperature for Wednesday, Thursday and Friday was 40°C. The average for Thursday, Friday and Saturday was 41° C. If temperature on Saturday was 42° C, what was the temperature on Wednesday?
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The average of four consecutive even numbers is 15. The 2nd highest number is :
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There are 30 students in a class. The average age of first 10 students is 12.5 years. The average age of the remaining 20 students is 13.1 years. The average age (in years) of the students of the whole class is :
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If 25a + 25b = 115, what is the average of a and b?
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In an exam, the average marks obtained by Jhon in English, Math, Hindi and Drawing were 50. His average mark in Maths, Science, Social Studies and Craft were 70. If the average mark in all seven subjects is 58, his score in Maths was 
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A man travels equal distances of his journey at 40, 30 and 15 km/h. respectively. Find his average speed for whole journey.
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The average age of husband and his wife was 23 years at the time of their marriage. After five tears they have a oneyear old child. The average age of the family of three, when the child was born, was
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The average of 11 results is 60. If the average of first six results is 58 and that of last six is 63, find the 6th result
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Of the three numbers, the first is twice the second and the second is twice the third. The average of the reciprocal of the numbers is 7/72. The numbers are:
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The average of six number is x and the average of three of these is y. the average of the remaining three is z, then
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