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Sum of ninth, tenth and eleventh number = 20 × 90 – 8 × 114 – 9 × 40 = 528 Let tenth number = x = eleventh number So, ninth number = 0.75 × x = 0.75x So, x + 0.75x + x = 528 Or, 2.75x = 528 Or, x = 192
Average of 20 numbers is 90. Average of first 8 numbers is 125 while average of last nine numbers is 40. If ninth number is 25% less than the tenth numb...
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Average of 12 observations calculated by a student was 60 but when he again went through his observations he realised that he took value of three observ...
The average profit of a shop for the first 3 months is Rs.500 per month. If the shop owner wants the average profit to be Rs.800 per month over 6 months...
The average cost price of articles 'P' and 'Q' together is Rs. 280, where the cost price of article 'Q' is Rs. 40 more than that ...
If the average of 38, 49, 42, and 'b' is 50, then find the value of '2b'.
The average score of five students is 24. When the scores of two additional students are included, the average drops by 2. What is the combined total o...
The average age of a group of 50 students is 16 years. If 3 students whose ages are 18 years, 26 years, and _____ years are replaced by 3 new students w...
There are 5 consecutive odd and 3 consecutive even numbers. The sum of five consecutive odd numbers is 120 and the lowest even number is 4 more than the...
