Question
A person deposited ₹500 for 3 years, ₹650 for 5
years, and ₹1,250 for 7 years. He received a total simple interest of ₹1,620. The rate of interest per annum is:Solution
Let the per annum rate =x% Interest at the rate of x% in 3 years on the 500 Rs – 
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Average of 6 numbers is 12. If one number 5 is replaced by 17, find the new average.
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Average of 15 observations calculated by a student was 70 but when he again went through his observations he realised that he took value of three observ...
The average of 6 numbers is 45. If one more number is added, the new average becomes 47. Find the number added.
There are five containers in a truck hold. The weight of the first container is 100 kg and the weight of the second container is 20% higher than the wei...
The average of the present age of 6 members of a family is 42 years. The present age of the youngest member is 12 years. Then what was the average age o...
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