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