Teacher:In this task, you need to answer the given multiple-choice question on the gain. Gain is the value by which to multiply the input. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.
Teacher: Now, understand the problem? Solve this instance: Problem: what sum of money will produce rs . 70 as simple interest in 3 years at 3 1 / 2 percent ? 
Options: a ) 263 , b ) 500 , c ) 367 , d ) 368 , e ) 666.7
Student:
e