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math for Ms. Sue

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The fifth grade marching band includes boys and girls.

There are 28 boys in the marching band.

The 28 boys are 7/10 of the students in the marching band.


a. What fraction of the students n the marching band are girls?

b. What is the total number of students in the marching band?


a 3/10?

b I do not know

Please answer and explain.

  • math for Ms. Sue -

    b.
    (7/10)x = 28

    x = 28 / (7/10)

    x = 28 * (10/7)

    x = 280 / 7

    x = 40

  • math for Ms. Sue -

    Your answer for a is right.

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