| Direction: Each question consists of four statements followed by five conclusions. Consider the given statements to be true even if they seem to be at variance with commonly known facts. Read all the conclusions and then decide which of the given conclusions definitely does not logically follow from the given statements using all statements together and mark that conclusion as your answer. |
| Statements: |
| All printers are scanners. |
| All scanners are mouses. |
| No mouse is a keyboard. |
| Some keyboards are pointers. |
A) Some scanners are not pointers.
B) All pointers can be printers.
C) Some mouses are not printers.
D) All keyboards can be pointers.
E) Some scanners are definitely not keyboards.
Correct Answer: B
Solution :
All scanners are mouses (a) + No mouse is a keyboard (e) = A + E = E = No scanner is a keyboard (e) + Some keyboards are pointers (I) = E + I = O* = Some pointers are riot scanners (O*). Hence conclusion (a) may follow. All printers are scanners (a) + All scanners are mouses (a) = A + A = A = All printers are mouses (a) + No mouse is a keyboard (e) = A + E = E = No printer is a keyboard (e) + Some keyboards are pointers (I) = E + I = O* = Some pointers are not printers (O*). Hence conclusion (b) does not follow. All printers are scanners (a) + All scanners are mouses (a) = A + A = A = All printers are mouses (a)\[\to \] conversion \[\to \] Some mouses are printers (I). Hence conclusion (c) may follow. Some keyboards are pointers (I), hence conclusion (d) follows. All scanners are mouses (a) + No mouse is a keyboard (e) = A + E = E = No scanner is a keyboard (e). Hence conclusion (e) follows.
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