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- Write the ratio clearly.
- Find the common multiplier.
- Apply it to the missing term.
Correct Answer: B
Correct Answer: B
Method / Topic: Ratio and Proportion
The answer keeps the ratio proportional.
Short Explanation
Detailed Explanation
Correct Answer: B
Method / Topic: Ratio and Proportion
In the ratio Boys:Girls = 5:4, 4 parts represent girls. If 4 parts = 18, then 1 part = 18/4 = 4.5. Boys are 5 parts, so boys = 5×4.5 = 22.5. This is not a whole number, so in a real class the data is not practical. But mathematically, the correct option from the given choices is 22.5.
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Learn + Solve: Shortcut, Trap & Fast Route Click to view shortcut, steps, and common mistake
Shortcut used, common trap, and the fastest solving route
- Write the ratio clearly.
- Find the common multiplier.
- Apply it to the missing term.
The ratio of boys to girls in a class is 5:4. If there are 18 girls, how many boys are there?
Explanation
Correct Answer: B
Method / Topic: Ratio and Proportion
The answer keeps the ratio proportional.
Short Explanation
Detailed Explanation
Correct Answer: B
Method / Topic: Ratio and Proportion
In the ratio Boys:Girls = 5:4, 4 parts represent girls. If 4 parts = 18, then 1 part = 18/4 = 4.5. Boys are 5 parts, so boys = 5×4.5 = 22.5. This is not a whole number, so in a real class the data is not practical. But mathematically, the correct option from the given choices is 22.5.
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