Kunci Jawaban Matematika Kelas 8 SMP Halaman 253 Nomer 1-5 Ayo Kita Berlatih 9.3, Beserta Penjelasannya

Jawaban:

Rata-rata = (8x95) + (6x85) + (10x80) + (9x70) + (7x65)/(8+6+10+9+7)

= 760+510+800+630+455/40

=3155/40

=78,875

=78,87

=78,9

2. Perhatikan dua data berikut ini.

Data X: 4, 5, 5, 6, 7, 7, 8, 8, 8, 9, 9, 10, 10, 12

Data Y: 4, 5, 5, 6, 7, 7, 8, 8, 8, 9, 9, 10, 10, 16