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1. Найти вероятность того, что среди взятых наудачу пяти деталей две стандартные, если вероятность того, что каждая деталь окажется стандартной, равна 0,9.
2. Команда состоит из двух стрелков. Числа очков, выбиваемых каждым из них при одном выстреле, являются случайными величинами Х1 и Х2 , которые характеризуются следующими законами распределения:
Число очков Х1 3 4 5
Вероятность 0,2 0,3 0,5
Число очков Х2 1 2 3 4 5
Вероятность 0,1 0,1 0,1 0,2 0,5
Результаты стрельбы одного стрелка не влияют на результаты стрельбы второго. Составить закон распределения числа очков, выбиваемых данной командой, если стрелки сделают по одному выстрелу.-
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