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MathematicsMathematics
2 January, 01:22

The average length of the eight words Betty was asked to spell was 9 letters. The first seven words had the following lengths: 8 letters, 9 letters, 6 letters, 10 letters, 7 letters, 9 letters, and 11 letters. What was the length of the eighth word?

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  1. 2 January, 02:12
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    8+9+6+10+7+9+11=60

    60/7=8.57

    (60+X) / 7=9

    60+X=63

    -60 - 60

    X=12

    Something in my work is wrong but the correct answer is 12 letters
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Home » Mathematics » The average length of the eight words Betty was asked to spell was 9 letters. The first seven words had the following lengths: 8 letters, 9 letters, 6 letters, 10 letters, 7 letters, 9 letters, and 11 letters. What was the length of the eighth word?
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