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March 26, 2017

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How do I find the value of x such that the data set has the given mean.
Example: 11,12,5,3,x;
Mean=7.4

  • Algebra - ,

    sum=(7.4)5=37. 37-11-12-5-3=x=6.

  • Algebra - ,

    (11+12+5+3+x)/5=7.4
    31+x/5=7.4
    Multiply both sides by 5
    31+x=37
    x=6

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