For a recuperating patient, the doctor recommended a diet containing 10% minerals and at least 30% protein. In how many different ways can we prepare this diet by mixing at least two ingredients?
Explanation:
The diet should contain 10% minerals. P contains no minerals. ∴ P cannot be a part of any mixture. R and S both contain 5% minerals. ∴ Mix of R and S in any proportion cannot give 10% minerals. Consider O and R in the proportion x:y ∴ 10x + 5y = 10(x + y) ∴ 5y = 10y, which is not possible. Similarly, Q and S, O and S, and Q and R are not possible. Similarly a mix of three ingredients is not possible.
∴ The only possible mix is that of O and Q in equal proportion.
Hence, option (a).
» Your doubt will be displayed only after approval.
Help us build a Free and Comprehensive Preparation portal for various competitive exams by providing us your valuable feedback about Apti4All and how it can be improved.