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Tinggi badan lima anak adalah , , ,  dan . Jika ra...

Tinggi badan lima anak adalah begin mathsize 14px style 135 space cm end stylesize 14px 130 size 14px space size 14px cmsize 14px 138 size 14px space size 14px cmsize 14px 132 size 14px space size 14px cm dan Error converting from MathML to accessible text.. Jika rata-rata tinggi badan adalah size 14px 134 size 14px space size 14px cm, Tentukan nilai Error converting from MathML to accessible text..

Jawaban:

Dengan menerapkan konsep rata-rata:

begin mathsize 14px style straight X with bar on top equals fraction numerator sum for blank of straight x subscript straight i over denominator 10 end fraction end style 

Maka:

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell 134 space cm end cell equals cell fraction numerator 135 space cm space plus 130 space cm plus 138 space cm plus 132 space cm plus straight y over denominator 5 end fraction end cell row cell 134 space cm times 5 end cell equals cell 535 space cm plus straight y end cell row cell 670 space cm end cell equals cell 535 space cm plus straight y end cell row cell negative straight y end cell equals cell 535 space cm minus 670 space cm end cell row cell negative straight y end cell equals cell negative 135 space cm end cell row straight y equals cell 135 space cm end cell end table end style  

Jadi, Agar rata-rata lima anak begin mathsize 14px style 134 space cm end style maka nilai begin mathsize 14px style straight y end style harus size 14px 135 size 14px space size 14px cm.

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