Ashley has 36 coins totaling $4.20 in quarters and dimes. How many of each coin does she have?
1 answer:
You might be interested in
Answer:
11.84% approx.
Step-by-step explanation:
Expected return = Respective return × Respective probabilities
= (18.5 × 0.71) + (-7.6 × 0.29)
= 10.931%
Probability Return Probability ×(Return - expected return)²
0.71 18.5 0.71×(18.5 - 10.931)² = 40.67573
0.29 -7.6 0.29×(-7.6 - 10.931)² = 99.585409
Total = 140.261139%
=
= 11.84319 ≈ 11.84% approx.