+414 25% of the books in a library are Malay books. The rest are Tamil, Chinese and English books in the ratio of 9:2:4. There are 480 more tamil books than Malay books. How many books are there in the library altogether?(help me)
+128475 25% of the books in a library are Malay books. The rest are Tamil, Chinese and English books in the ratio of 9:2:4. There are 480 more tamil books than Malay books. How many books are there in the library altogether?
25% are Malay and 75% are the rest...of these (9/15)75% = 45% are Tamil
Let T be the total...and we know that
.45T = .25T + 480 subtract .25T from both sides
.20T = 480 divide both sides by .20
T = 480/.20 = 2400 total books
Check
2400(.45 - .25) = 2400(.20) = 480
+128475 25% of the books in a library are Malay books. The rest are Tamil, Chinese and English books in the ratio of 9:2:4. There are 480 more tamil books than Malay books. How many books are there in the library altogether?
25% are Malay and 75% are the rest...of these (9/15)75% = 45% are Tamil
Let T be the total...and we know that
.45T = .25T + 480 subtract .25T from both sides
.20T = 480 divide both sides by .20
T = 480/.20 = 2400 total books
Check
2400(.45 - .25) = 2400(.20) = 480
