Question

a student scoring 20 percent marks in an examination failed by 30 marks while another student who scores 32 percent marks gets 42 marks more than the minimum required for passing the examination. find the total number of marks in the examination. a. 600 b. 500 c. 700. d. 450​

Answer 1

let the amount is x

(20/100)x+30=32/100x-42

solve and get x=600