If
2.5 ounces of chocolate are needed for each muffin, then the number of ounces of chocolate needed to make 48 muffins is
48×2.5=120 ounces. Since 1 pound = 16 ounces, the number of pounds that is equivalent to
120 ounces is
=7.5 pounds.Therefore, 7.5 pounds of chocolate are needed to make the 48 muffins.
Choice B is incorrect. If 10 pounds of chocolate were needed to make 48 muffins, then the total number of ounces of chocolate needed would be
10×16=160 ounces. The number of ounces of chocolate per muffin would then be
=3.33 ounces per muffin,not
2.5 ounces per muffin. Choices C and D are also incorrect. Following the same procedures as used to test choice B gives
16.8 ounces per muffin for choice C and
40 ounces per muffin for choice D, not
2.5 ounces per muffin. Therefore,
50.5 and
120 pounds cannot be the number of pounds needed to make 48 signature chocolate muffins.