1. There are 100 gadgets within which 10 are not functioning properly. What is the probability to find 4 disfunctional gadgets within 10 randomly taken ones. 2. The probability distribution of a random variable X is given by the table: X 2.0 2.1 2.2 2.3 2.4 P (X) 0.13 0.8 0.39 0.24 0.16 Find the expected value (mean), variance and standard deviation. 3. Random variable X is normally distributed with parameters u = -1, o = 1. Calculate bability falle ; 11