If a : b = 1 : 2 and b : c = 2 : 1, then what is the value of a : b : c?
2021
If a : b = 1 : 2 and b : c = 2 : 1, then what is the value of a : b : c?
- A.
2 : 1 : 1
- B.
1 : 2 : 1
- C.
2 : 4 : 1
- D.
1 : 1 : 2
Attempted by 236 students.
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Correct answer: B
Given ratios: a : b = 1 : 2 and b : c = 2 : 1.
Observe the common term 'b'. In both ratios, 'b' is represented by the value 2.
Since 'b' is already equal in both ratios, they can be combined directly.
Therefore, a : b : c = 1 : 2 : 1.
Final Answer: Option 2