Official ExplanationTablet Z has the most iron, but it does not contain less zinc than Tablet X, so
(A) is incorrect.
Tablet Z has \(45 + 20 + 15 = 80\) mg of the three elements combined, which is greater than any of the other row totals, so
(B) is correct.
Tablet X has the most calcium. But it has only 17 units of iron and 14 of zinc, which are less than the other tablets’ contents, so
(C) is correct.
For
(D), add the values in the middle column to find that one of each tablet would include 40 + 25 + 20 = 85 mg of calcium. Then three of each tablet would contain 3 × 85 = 255 mg of calcium, which is not between 140 and 250, so
(D) is not correct. Answer is
(B) and
(C).Answer: B,C