The average height of 5 students was 158 cm. Then, 2 more students whose average height was 155 cm joined 5 students. The average height of all students is
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Jawaban:
157.14 cm
Penjelasan dengan langkah-langkah:
average = sum of data / n
= (5x158 + 2x155)/7
= (790 + 310)/7
= 1100/7
= 157.14 cm
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