Question

# How many unique ways are there to arrange the letters of the word $$'PRIOR'$$

A
60
B
120
C
180
D
150

Solution

## The correct option is A $$60$$PRIOR Number of letters $$=5$$Out of which $$R$$ is repeated twice $$\Rightarrow$$There are $$4$$ diffrent letters Total number of arrangements $$=\cfrac { 5! }{ 2 } \\ =\cfrac { 120 }{ 2 } \\ =60$$Therefore possible ways $$=60$$Mathematics

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