在CFA考試中也是要考數學的，在上學的時候你對CFA考試頭疼嗎？如果你正在準備考CFA考試，這不小編給你送了一道概率相關的考題，看看你能不能做對呢？

Compared to investing in a single security, diversification provides investors a way to:

A  increase the expected rate of return.

B  decrease the volatility of returns.

C  increase the probability of high returns.

【答案以及解析】B Diversification provides an investor reduced risk. However, the expected return is generally similar or less than that expected from investing in a single risky security. Very high or very low returns become less likely.

【核心詞匯】probability ：概率 是指對隨機事件A發生的可能性大小的度量（數值），記做P(A)。