The store received 30 refrigerators. Five of them def

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Task 1. The store received 30 refrigerators. Five of these defects. The buyer chooses randomly one of them. Find the probability that it will
a) defective
b) without defekta.Zadanie 2. Of the 100 produced parts 10 turned unconventional. To check the selected 5 items. What is the probability that two of them nestandartny.Zadanie 8.
For a number of the distribution of tasks 7 locate the expectation, variance and standard deviation of x.

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