An experiment consists of 400 observations and four mutually exclusive groups. if the probability of a randomly selected item being classified into any of the four groups is equal, then the expected number of items that will be classified into group 1 is

Sally deposited money into a savings account paying 4% simple interest per year. the first year, she earned $75 in interest. how much interest will she earn during the following year? show your work and explain your reasoning in the space provided below.