2. Gold is measured in troy ounces, one of the units of apothecaries’ weights. In this system of weights, 1 scruple is 20 grains (exactly), 1 ounce is 480 grains (exactly), 1 ounce is 31.103 g, and 12 ounces equals 1 (troy) pound. How many scruples of gold are needed to make a ring weighing 3.77g.
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