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: find the compound interest on $ 50000 in 2 years at 4 % per annum , the interest being compounded half - yearly ? 
Options: a ) $ 645.56 , b ) $ 4121.60 , c ) $ 954.26 , d ) $ 745.69 , e ) $ 1020.45
b

Problem: the sale price sarees listed for rs . 400 after successive discount is 30 % and 20 % is ? 
Options: a ) 297 , b ) 879 , c ) 342 , d ) 762 , e ) 224
e

Problem: each of the cucumbers in 100 pounds of cucumbers is composed of 99 % water , by weight . after some of the water evaporates , the cucumbers are now 93 % water by weight . what is the new weight of the cucumbers , in pounds ? 
Options: a ) 2 , b ) 15 , c ) 92 , d ) 96 , e ) 98

b