How many letters will remain unchanged if the word MOBILE is arranged alphabetically?

Question

Accepted Answer

1. Write the letters with positions: $(1)\ M,\ (2)\ O,\ (3)\ B,\ (4)\ I,\ (5)\ L,\ (6)\ E$.  
2. Sort letters alphabetically: $B,E,I,L,M,O$, so positions become $(1)\ B,\ (2)\ E,\ (3)\ I,\ (4)\ L,\ (5)\ M,\ (6)\ O$.  
3. Compare each position. No letter stays in its original place.  
4. So $0$ letters remain unchanged.

FINAL_ANSWER: c

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