The following questions have three statements. Study the question and the statements and decide which of the statement(s) is/are necessary to answer the question. Find the rate of interest per annum. Statement I∶ Difference between the compound interest and simple interest earned on a certain sum in 3 years is Rs. 1024. Statement II∶ The amount doubles itself in 5 years invested in simple interest. Statement III∶ Simple interest earned in a year on the sum is Rs. 1600. Correct Answer Statement II alone or Statement I and III together are sufficient to answer the question. Statement I and III∶ SI for 1 years = Rs. 1600 ∴ SI for 3 years = Rs. 4800 And Difference between the compound interest and simple interest earned on a certain sum in 3 years is Rs. 1024; ∴ CI for 3 years = 4800 + 1024 = Rs. 5824 ∴ We can find the value of rate of interest. Statement II∶ Since amount doubles itself in 5 years invested in simple interest; ∴ SI for 5 years must be equal to the principal; ∴ P = /100 ∴ We can find the value of rate of interest. ∴ Statement II alone or Statement I and III together are sufficient to answer the question.