In a secondary school the seats for Maths, physics and social studies are in the ratio 8 : 5 : 7. there is a proposal to increase these seats by 75%, 40% and 50% respectively. What will be the new ratio?	Choose the correct choice from the following choices: A) 5 : 3 : 4 B) 4 : 2 : 3 C) 10 : 7 : 9 D) 1 : 3 : 4 E) None of these
Explanation :   Solution: Originally, let the number of seats for Maths, physics and social studies be 8x, 5x and 7x respectively.   Number of increased seats are (175% of 8x), (140% of 5x) and (150% of 7x).   i.e. (175*7x/100), (140*5x/100) and(150*7x/100) i.e. 14x, 7x and 21x/2.   .'. Required ratio = 14x : 7x : 21x/2 = 28x : 14x : 21x = 4 : 2 : 3   Answer : 4 : 2 : 3
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In a secondary school the seats for Maths, physics and social studies are in the ratio 8 : 5 : 7. there is a proposal to increase these seats by 75%, 40% and 50% respectively. What will be the new ratio?