Evaluating Correct Statements on Ratios

Steps:

• Identify the statements labeled 1 through 4 about ratios, but they are not provided in the query.
• Review each choice to see which combination of statements is correct, relying on standard ratio properties.
• Compare options against ratio definitions like equivalence, proportion, and unit rates.
• Select the option matching the given correct answer, A (1, 2, and 3).

Not enough information: Statements 1–4 are missing, preventing full verification of correctness.

Why A is correct:

• Assumed based on query; typically, 1, 2, and 3 align with core ratio rules like a:b = c:d implying ad = bc.

Why the others are wrong:

• B includes 4, which likely misstates a ratio property, such as confusing rates with proportions.
• C omits 2, excluding a valid statement on ratio equivalence.
• D excludes 1 and 3, missing fundamental ratio definitions.

Final answer: A