The mixing vat in a factory receives liquid ingredients through six separate value--- labeled R.S.T.U,Y and Z -- each of which has exactly two settings: open and closed.The mixing vat operator must ensure that each valve is set open or closed according to the following conditions: If T is open, both S and Z must be closed, R and Z cannot both be closed at the same time; If Y is closed, Z must also be closed;S and U cannot both be open at the same time. If Z is open, which of the following must be true?
Created: 5 years ago |
Updated: 3 years ago
best des
যেহেতু y = Z closed অর্থাৎ Y বন্ধ থাকলে Z বন্ধ থাকে। সুতরাং Y খোলা থাকলে Z খোলা থাকবে।
Md Azizur Rahman
Founder of Satt
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