The mean of 3 numbers is 7.two numbers are 4 and -5
Find the third number

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

Why is studying fractions important

Answer! if you don’t mind, can you explain