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'.

Problem: how many liters of a 40 % iodine solution need to be mixed with 35 liters of a 20 % iodine solution to create a 32 % iodine solution ?
Options: a ) 35 , b ) 49 , c ) 100 , d ) 102 , e ) 140
d

Problem: a man took loan from a bank at the rate of 12 % p . a . s . i . after 3 years he had to pay rs . 5400 interest only for the period . the principal amount borrowed by him was ?
Options: a ) 15002 , b ) 15001 , c ) 15000 , d ) 15007 , e ) 15009
c

Problem: what is 15 percent of 64 ?
Options: a ) 7.2 , b ) 8.4 , c ) 9.6 , d ) 10.4 , e ) 11.8
c