y=6 15 M == x Pix .. Solve the following problems. Show your complete solution. (5pts) complete bolition. Lots 2.10 +3.20 1. Four coins are tossed. Let Z be the random variable representing the number of ho occur. Find the values of the random variable Z. TIL. The number of items sold per day at a retail store, with its corresponding pro shown in the table. Find the variance and standard deviation of the probabil distribution. Show your complete solution. (10 pts) Number of items Sold X Probability P(X) 19 0.20 20 0.20 21 0.30 22 0.20 23 0.10 4 Find the area that corresponds to z= 2.58. Show your solution. Chmursobution,​