In an efficient market, professional portfolio management can offer all of the following benefits except which of the following? A. A superior risk-return trade-off
B. Low-cost diversification
C. A targeted risk level
D. Low-cost record keeping

A. A superior risk-return trade-off

Explanation:

In a normal and efficient market a professional portfolio management service is able to offer  Low-cost diversification, A targeted risk level, and even a Low-cost record keeping. What they cannot offer is a superior risk-return trade-off, this is because risk-return holds a very correlated trade-off in which the higher amount of risk your portfolio holds the higher returns you can get from it, but this does not get rid of the risk which can cause you to lose all of your money. Therefore "superior" is unnachievable.

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"we first find value of tax in dollars.

the difference between the two prices   is: 23. 54 - 22 = 1.54

therefore the sales tax in dollars is 1.54

the tax % will be   (amount of tax / original cost price ) × 100

(1.54 / 22) × 100  → (0.07) × 100 =   7

so the tax rate is 7%

we can double check the answer.

7 % of 22   → (7/100) × 22 → 0.07 × 22 = 1.54

22 + 1.54 = 23.54"