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Count the beads on Pooja's necklace string. What is the ratio of red beads to blue beads, in simplest form?

Class 6Ratio and ProportionRatio and Proportion
  • A2 : 3
  • B6 : 10
  • C3 : 2
  • D3 : 5

Step-by-Step Solution

There are 6 red and 4 blue beads. (divide both by 2). (2 : 3 is the wrong order; 3 : 5 compares red with all beads.)
Answer: C) 3 : 2

Key idea: What a ratio means

The ratio 2 : 3 says: for every 2 of one thing, there are 3 of another. In a fruit basket of 2 apples and 3 oranges, the ratio of apples to oranges is 2 : 3. **Order matters** — the ratio of oranges to apples in the same basket is 3 : 2. The two quantities must be in the same unit (you can't ratio apples to kilograms unless you convert).

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