There are three on-off switches on a control panel A, B, and C.
- see the answer in the detail
Explanation
There are three on-off switches on a control panel A, B, and C. They have to be changed from an initial setting to a second setting according to the following conditions:
- In case only switch A is the switch on in the initial setting, then turn on switch B.
- In case switches A and B are the only switches on in the initial setting, then turn on switch C.
- In case all the three switches are on initially setting, then turn off the switch C.
- For any other initial setting, turn on all switches that are off and turn off all switches, if any, that are on.
Question
In case of switch, A is off in the second setting, which among the following could have been the initial setting?
A) A on, B on, C on.
B) A on, B on, C off.
C) A on, B off, C on.
D) A on, B off, C off.
E) A off, B on, C off.
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