Six roads lead to a country. They may be indicated by letters X, Y, Z and digits 1, 2, 3. When there is storm,
Six roads lead to a country. They may be indicated by letters X, Y, Z and digits 1, 2, 3. When there is storm, Y is blocked. When there are floods X, 1 and 2 will be affected. When road 1 is blocked, Z also is blocked. At a time when there are floods and a storm also blows, which road(s) can be used ?
(a) Z and 2 (b) Only Z (c) Only 3 (d) Only Y
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(c) Y is blocked for storms. For floods X, 1 and 2 are blocked and Z is blocked, whenever 1 is blocked. So, for floods and storms, only unblocked road left is 3.
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