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Answer : 2 2 : 3 : 4 Explanation : Answer: B) 2 : 3 : 4 Explanation: Seats for Mathematics, Physics and Biology in a school are in the ratio 5 : 7 : 8.Seats for Mathematics, Physics and Biology in a school are 5x, 7x and 8x.There is a proposal to increase these seats by 40%, 50% and 75% respectively.Then Seats for Mathematics, Physics and Biology in a school will be1.4 X 5x, 1.5 X 7x and 1.75 X 8x andratio will be 7 : 10.5 : 14  =