An Electric current travelling through a resistor may take one of the three different paths, with probabilities .25, .30 and .45 respectively for path 1, 2 and 3. Suppose we monitor the path taken in n=10 consecutive trials. Find the probability that the electrical current will travel the path 1- 2times, path 2- 4 times and path 3- 4 times. Find the mean for path 2.