alleryఐదు విభిన్న అక్షరాల బిళ్ళలను (letter tiles) ఒక వరుసలో ఎన్ని విధాలుగా అమర్చవచ్చు?
A25
B240
C60
D120
Answer & Solution
Correct answer: D. 120
ఐదు విభిన్న బిళ్ళలను 5! = 5 x 4 x 3 x 2 x 1 = 120 విధాలుగా అమర్చవచ్చు.
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