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  • RE: OG 2016 DS 70.
    Default Asked on August 12, 2017 in Data Sufficiency.

    If the ratio of the number of teachers to the number of students is the same in School District M and School District P, what is the ratio of the number of students in School District M to the number of students in School District P?

    (1) There are 10,000 more students in School District M than there are in School District P.

    (2) The ratio of the number of teachers to the number of students in School District M is 1 to 20.

    For the 2nd statement,  tm/sm = 1/20.    So from the question stem i get tm/sm=tp/sp         I just rearranged the algebra to get sm/sp .

    Later i realised that this is a ratio and by giving different values for tp/sp = 2/40, 3/60   sm/sp will be different.   I would like to understand this concept more and also with both statements together, i would like to understand how did it come to E.

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