1 / 5 × 8 + 0.6 × 0.2 + 1 / 5 × 40%

1 / 5 × 8 + 0.6 × 0.2 + 1 / 5 × 40%

1 / 5 × 8 + 0.6 × 0.2 + 1 / 5 × 40%
=1/5*(8+0.6+0.4)
=9/5