In school there are 550 students if the ratio of lefties to righties is 2:9 how many lefties are in the school

Question

In school there are 550 students if the ratio of lefties to righties is 2:9 how many lefties are in the school

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Remi 3 days 2021-10-11T00:35:02+00:00 1 Answer 0

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    0
    2021-10-11T00:36:52+00:00

    Answer:

    100

    Step-by-step explanation:

    550=L+R

    2/9=L/R

    =========

    Solve the second for L:   2R/9=L

    Plug this into the first:  550=2R/9 +R

    (2/9+1=11/9)  So          :   550=11R/9

    Now multiply both sides by 9/11:   550(9)/11=R

    R=50(9)=450

    L=550-R=550-450=100

    There are 100 lefties

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