Me plz. in asap. thxs with 15 and 16 thxs

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

If 2(a^2+b^2)=(a+b)^2 then, > a+b=0, > ab=0, > a=b, > 2a=b

A. what does the point (4, 122) represent? b. what is the unit rate? c. what is the cost of buying 10 tickets?