Tentukan nilai rata2 dri data yg disajikan pd tbel d samping

nilai rata2
[tex] = \frac{(3 \times 1) + (6 \times 5) + (7 \times 2) + (8 \times 2) }{1 + 5 + 2 + 2} \\ = \frac{3 + 30 + 14 + 16}{10} \\ = \frac{63}{10} \\ = 6.3[/tex]