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March 30, 2017

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A set of building blocks includes squares of various shapes and colors. If 20% of the blockers were square and 50% of the squares block are red, then ___ of the blocks are red squares.

My answer is 40% (20% x 50% / 100% = 40%). Is this correct?

  • Math: percentage problem - ,

    No. Consider you have 100 blocks.
    20 are square.
    10 of the square are red.
    That is ten percent of the blocks are red squares.

    check my thinking.

  • Math: percentage problem - ,

    wow... thank you... i feel dumb now...

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