[أمووول]

السلام عليكم
الله يحفظكم
أحتاج مساعدتكم في حل هذا السؤال ماعرفت أحله

A survey found that 80% of students never smoked. If a sample of 10 students is

selected at random, find the probability that 9 or more of them have never smoked.