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11 August, 10:13

The average height of a family of five is 150 cm. If the height of 4 family members is 153, 150, 151, and 152, find the height of the fifth member.

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  1. 11 August, 12:48
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    J can find the height of the fifth member on this way

    S=150

    S1=153

    S2=150

    S3=151

    S4=152

    S5=?

    S = (s1+s2+s3+s4+s5) / 5:

    5*150 = 153+150+151+152+S5

    S5=5*150-606=750-606=144

    Answer is 144 cm
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