Which safety blades have cadmium tips, and which safety blade has about one-third the amount of cadmium?

Which safety blades have cadmium tips, and which safety blade has about one-third the amount of cadmium?

• A. Safety blades 1, 2, and 3 have cadmium tips; safety blade 4 has about one-third.
• B. Safety blades 2, 3, and 4 have cadmium tips; safety blade 1 has about one-third.
• C. All safety blades have cadmium tips; blade 4 has extra.
• D. None have cadmium tips.

Answer: (A)

The question is about reading a data distribution: which safety blades have cadmium tips and which blade carries about one-third of that amount. The correct statement matches the observed pattern that three blades have cadmium tips, while the remaining blade contains roughly one-third as much cadmium. This fits the data because it identifies both the presence on most blades and the significantly reduced amount on the fourth blade in a single, consistent description. The other options describe incompatible distributions—some claim more blades have cadmium tips, some claim all, and one claims none. They don’t align with the measured pattern, so they aren’t correct.

The question is about reading a data distribution: which safety blades have cadmium tips and which blade carries about one-third of that amount. The correct statement matches the observed pattern that three blades have cadmium tips, while the remaining blade contains roughly one-third as much cadmium. This fits the data because it identifies both the presence on most blades and the significantly reduced amount on the fourth blade in a single, consistent description.

The other options describe incompatible distributions—some claim more blades have cadmium tips, some claim all, and one claims none. They don’t align with the measured pattern, so they aren’t correct.