Five distinct research projects are to be assigned to three specialize
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30 Sep 2026, 04:11
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Five distinct research projects are to be assigned to three specialized laboratories. Each project will be assigned to exactly one laboratory, and each laboratory can host any number of projects. If Laboratory $A$ must be assigned at least one project, in how many different ways can the five projects be assigned?
A. (A) 32
B. (B) 122
C. (C) 180
D. [D] 211
E. (E) 243
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