Question
A sum of money amounts to Rs.767 in 3 years, and to
Rs.806 in 4 years on simple interest at 6% annum. What is the sum?Solution
3 years=767… (1) 4 years=806… (2) Solve Equation (2)-(1) 1 year interest =39 Now the invested sum =767-39×3=650Rs.
The marks obtained by 7 students in a class in mathematics are 43, 44, 65, 41, 53, 65 and 62. The mode of the data is:
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