سؤال في الاحصاء

[Dr.mariam]

عندي مثال شابتر 4 الدرس 5-4

صفحة 239 مثال 53

A combination lock consists of the 26 letters of the alphabet. If a 3-letter combination is needed, find the probability that the combination will consist of the letters ABC in that order. The same letter can be used more than once. (Note: A combination lock is really a permutation lock

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الحل موجود ف الكتاب بس مو فاهمة السؤال ياريت احد يشرحلي بشكل مبسط :( وشكراً