When 2,000 hamburgers a day are produced,the marginal social benefit from the 2000th hamburger is $1.50 and its marginal social cost is $1.00.And when 7,500 hamburgers a day are produced,the marginal social benefit from the 7,500th hamburger is $1.00 and its marginal social cost is $1.50.The efficient quantity of hamburgers is ________ a day

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The efficient quantity is where marginal social benefit equals marginal social cost. From the given information, we know that at 2,000 hamburgers the marginal social benefit is greater than the marginal social cost and at 7,500 hamburgers the marginal social cost is greater than the marginal social benefit. Therefore, the efficient quantity must be between 2,000 and 7,500 hamburgers. Hence, the answer is B.

When 2,000 Hamburgers a Day Are Produced,the Marginal Social Benefit