Question 45

Five professors A, B, C, D and E are sitting in a row facing North (not necessarily in the same order). A is second to the left of D. Only two professors are sitting between C and E. No professor is sitting to the right of E.
How many professors are sitting to the left of D?

Solution

No professor is sitting to the right of E.

_ _ _ _ E

Only two professors are sitting between C and E.

_ C _ _ E

A is second to the left of D.

A C D _ E

Now only 'B' is remaining which can be placed on the blank space.

A C D B E

According to the above arrangement, two professors are sitting to the left of D.

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Five professors A, B, C, D and E are sitting in a row facing North (not necessarily in the same order). A is second to the left of D. Only two professors are sitting between C and E. No professor is sitting to the right of E.How many professors are sitting to the left of D?