Help me with the question in the image​

275/20 simplified (lmbo it told me to add more characters)

In simplified exponential notation, the expression a^2•a^-3•a 1/a 0

An assembly consists of two mechanical components. suppose that the probabilities that the first and second components meet specifications are 0.87 and 0.84. assume that the components are independent. determine the probability mass function of the number of components in the assembly that meet specifications. x