the mean height of 4 children is 157.5 cm. if the 5th child enters this group, then the mean height will decrease 0.5 cm. how tall is the 5th child?
Matematika
gisellaurelia
Pertanyaan
the mean height of 4 children is 157.5 cm. if the 5th child enters this group, then the mean height will decrease 0.5 cm. how tall is the 5th child?
2 Jawaban
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1. Jawaban Anonyme
Bab Statistika
Matematika SD Kelas VI
(4 x 157.5) + a = (157.5 - 0.5) x 5
630 + a = 157 x 5
a = 785 - 630
a = 155 cm -
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