PROBABILITY . The bank safe code contains 2 Latin letters and 4 numbers. What is the probability of opening the safe by dialing the code at random if it is known that 1) neither letters nor numbers are repeated, 2) the letters are the same, and there are no 3 or 7 among the numbers? . There are 37 balls: 16 red, 4 blue, 6 green and 11 yellow balls. How many ways can you extract 4 balls so that there are at least three balls of the same color among them? STATISTICS . Two independent variables X and Y are set by the tables Find 1. Mean values ux, My, variances 02 X, 02 Y 2. The distribution tables for random variables W = 2X + Y, Z = X . Y. 3. Mean values and variances for both W and Z by the distribution tables according to their properties