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In what ratio must a mixture of 30% alcohol strength be mixed with that of 50% alcohol strength so as to get a mixture of 45% alcohol strength ?
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- 1 : 2
- 1 : 3
- 2 : 1
- 3 : 1
Correct Option: B
Let x litres of first mixture is mixed with y litres of the second mixture.
According to the question,
| ⇒ | = | |||
| 0.7x + 0.5y | 11 |
⇒ 6.3x + 4.5y = 3.3x + 5.5y
⇒ 6.3x – 3.3x = 5.5y – 4.5y
⇒ 3x = y
| ⇒ | = 1 : 3 | y |
