Using the formula for calculating weighted averages, we can find the weighted average (A+) with the given values:
A+ = (A a + B b) / (a + b)A+ = (8.7 8 + 3.8 3) / (8 + 3)A+ = (69.6 + 11.4) / 11A+ = 81 / 11A+ = 7.3636
Therefore, the weighted average (A+) is 7.3636.
Using the formula for calculating weighted averages, we can find the weighted average (A+) with the given values:
A+ = (A a + B b) / (a + b)
A+ = (8.7 8 + 3.8 3) / (8 + 3)
A+ = (69.6 + 11.4) / 11
A+ = 81 / 11
A+ = 7.3636
Therefore, the weighted average (A+) is 7.3636.