For the following questions answer them individually
The average weight of 14 boys in a class is 40.25 kg and that of the remaining 10 boys is 35.15 kg. Find the average weight of all the boys in the class.
A sum of ₹12,000 amounts to ₹12,960 at 2% per annum simple interest. Find the duration of the deposit.
Two students A and B appeared in an examination. A secured 9 marks more than B and his marks were 60% of the sum of their marks. The marks obtained by A were:
Kalyan bought an article for ₹6,400 and spent ₹600 on its repairs. He marked his article at 8% above the overall cost price. If he sold the article for ₹6,426 after giving $$x$$ % discount, then the value of $$x$$ is:
The difference between the compound inierest and simple interest on a certain sum at 20% per annum for 2 years is ₹9,000. Find the sum.
A and B together can do a certain work in 36 days, whereas B and C together can do it 40 days. A, B and C together can do it in 30 days. B alone can do $$\frac{7}{8}$$ part of the original work in:
By selling an article for ₹1,024, there is a loss of 20%. At what price (in ₹) should it be sold to gain 8%?
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