Question at position 7 Learning Objective 3
A serving of a food has: 20g of total fat 2g of trans fat 12g of saturated fat How many grams of unsaturated fatty acids are in one serving of the foodstuff?18g33g6g8gBlackTom题目解析

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Question at position 7 Learning Objective 3
A serving of a food has: 20g of total fat 2g of trans fat 12g of saturated fat How many grams of unsaturated fatty acids are in one serving of the foodstuff?18g33g6g8gBlackTom题目解析

BlackTom AI · Accepted Answer

Interrogating the question, we’re told a serving has 20 g total fat, 2 g trans fat, and 12 g saturated fat, and we’re asked for the grams of unsaturated fatty acids in one serving.
Option 18 g: This would imply unsaturated fats exceed total fat, which is impossible since total fat is the sum of all fat types in the serving. Therefore 18 g cannot be correct.
Option 33 g: This is clearly larger than the total fat listed (20 g). Since unsaturated fats cannot exceed total fat, this option is mathematically and factually implausible.
Option 6 g: If one counts unsaturated fats by subtracting both saturated fat (12 g) and trans fat (2 g) from total fat (20 g), you get 20 − 12 − 2 = 6 g. This interpretation views unsaturated fatty acids as cis-unsaturated fats excluding trans fats, which is a common classroom approach when trans fat is presented separately from “unsaturated.”
Option 8 g: If you simply subtract saturated fat from total fat (20 g − 12 g), you’d get 8 g, which corresponds to total unsaturated fat including trans. However, because the data separately lists trans fat, some curricula treat trans fat as a distinct category and ask for the non-trans (cis) unsaturated portion, yielding 6 g rather than 8 g.
Thus, the reasoning hinges on whether unsaturated fatty acids are interpreted as all fats that are not saturated (which would give 8 g) or as cis-unsaturated fats excluding trans fats (which would give 6 g). Given the explicit listing of trans fat, the interpretation that excludes trans fats from the unsaturated count leads to 6 g, aligning with the subtraction 20 − 12 − 2.
In summary, 18 g and 33 g violate basic fat accounting by being too large, and 8 g represents total unsaturated including trans, which is not the interpretation suggested by separating trans fat. Therefore, 6 g is the outcome that matches the separated-trans-fat convention used in many assessments.

Question at position 7 Learning Objective 3 A serving of a food has: 20g of total fat 2g of trans fat 12g of saturated fat How many grams of unsaturated fatty acids are in one serving of the foodstuff?18g33g6g8gBlackTom题目解析

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