In what ratio must a grocer mix two varieties of tea costing Rs. $60$ per kg and Rs. $65$ per kg so that by selling the mixture at Rs. $68.20$ per kg, he gains $10%$?
Options:
- A: $3 : 2$
- B: $3 : 4$
- C: $3 : 5$
- D: $4 : 5$
Related Practice Questions:
- A sum of ₹4000 is invested at compound interest for 2 years at a rate of 10% per annum. What will be the total amount at the end of 2 years?
- At what rate of simple interest per annum will a sum of money double itself in 8 years?
- The difference between the compound interest and simple interest on a certain sum of money for 2 years at 5% per annum is ₹25. Find the sum.
- The study of living organism :
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