math

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There are fifty marbles in a
sack: red, blue and green.
There are ten more green
than blue marbles in the
sack. The probability of
drawing a red or blue marble
is one-half. Write and solve
an equation to determine
how many of each color
marble is in the sack

  • math -

    "The probability of
    drawing a red or blue marble
    is one-half."
    Means that Red+Blue=half * 50 = 25.

    Can you do the rest?

  • math -

    i don't know if i can do it...

  • math -

    Known facts:
    Red+Blue+Green=50
    Red+Blue=25
    Green-Blue=10

    Can you juggle a little with the above equations to come up with the answer?

  • math -

    so there be 25 green, 15 blue, 10 red???

  • math :) -

    Correct, good job!

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