A.  2 : 3 : 4

B.  6 : 7 : 8

C.  6 : 8 : 9

D.  None of these

1
Correct Answer :
2 : 3 : 4
Explanation :

Originally, let the number of seats for Mathematics, Physics and Biology be 5z, 7z and 8z respectively

Number of increased seats are (140% of 5z), (150% of 7z) and (175% of 8z)

=> [ (140/100) x (5z) ] , [ (150/100) x (7z) ] and [ (175/100) x (8z) ]

=> 7z, (21z/2) and 14z

=> The required ratio = 7z : (21z/2) : 14z

=> 2 : 3 : 4


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