George, Sergio, Kim, Nicolas, Michael, Joan, and Orlando are welders. Four of th

Question

George, Sergio, Kim, Nicolas, Michael, Joan, and Orlando are welders. Four of these welders will be hired to seal the nuclear waste containers used at Hanford waste site. The four must pass a high-level security clearance in addition to passing a rigorous weld test.

The four are to be chosen according to the following conditions:

If George or Sergio passes the weld test, the other will pass; if either fails, they both fail.

If Nicolas or Kim passes the security clearance, the other will pass; if either fails, they both fail.

If Nicolas or Sergio passes the weld test, the other will pass, too.

If Michael or Joan fails the security clearance, the other will pass.

Orlando and George passed the security clearance.

Michael and Sergio passed the weld test.

Kim passed security clearance.

Orlando passed weld test.

Joan fails security clearance.

Which of the following could be a list of welders hired to seal nuclear containers?

A. Michael, George, Nicolas, Orlando

B. Orlando, George, Michael, Sergio

C. Joan, Michael, Kim, Sergio

Explanation / Answer

A. Michael, george, nicholas, orlando

Since orlando has passed both the tests as per the question so he will be directly selected. Also george passed the security clearance and sergio passed the weld test. Its given that if sergio passes the weld test then george and nicholas will also pass it in two different points. This leads to the selection of george. Kim has passed the security clearance and its given that if kim pases it then nicholas will also pass it and this leads to nicholas’s selection. In the end michael has passed the weld test and its given that if joan fails the security clearance michael will pass it. Hence michael will be selected

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