Consider an economy with two types of firms, S and I. S firms always move together, but I firms move independently of each other. For both types of firms there is a 40% probability that the firm will have a 20% return and a 60% probability that the firm will have a -30% return. The standard deviation for the return on an individual firm is closest to

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Consider an economy with two types of firms, S and I. S firms always move together,
but I firms move independently of each other. For both types of firms there is a 40%
probability that the firm will have a 20% return and a 60% probability that the firm
will have a -30% return.
The standard deviation for the return on an individual firm is closest to
A) -10.00%
B) 24.49%
C) 9.80%
D) 12.25%
Transcribed Image Text:Consider an economy with two types of firms, S and I. S firms always move together, but I firms move independently of each other. For both types of firms there is a 40% probability that the firm will have a 20% return and a 60% probability that the firm will have a -30% return. The standard deviation for the return on an individual firm is closest to A) -10.00% B) 24.49% C) 9.80% D) 12.25%
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