Answers by visitors named: Surya

Civil engineering means the constructive based engineering

Initial: number of boys to girls 3:5 =3U:5U U means unit Later (3U +5): (5U +3) = 5:7 3U+5 5 ----- = --- 5U+3 7 Cross multiply 21U+35 = 25U+15 35-15 = 25U-21U 20 = 4U Therefore 1U =5 Initially girls are 5Units. So the answer is 25.

Thanks a lot Bosnian. Answer is exactly correct. Just wanted to provide the alternate method which got through Maths olympiad book.

Dear Steve, Thank you very much for your kind help. Can understand clearly. With regards, Surya

Very bad answer

2 rs may be gst