Let x1, x2, and x3 represent the times necessary to perform three successive repair tasks at a service facility. suppose they are independent, normal rvs with expected values μ1, μ2, and μ3 and variances σ1 2, σ2 2, and σ3 2, respectively.

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answer:

the domain is the set { -2, 0, 2, 3}

discussion:

the domain is the set of x values in the ordered pairs (x,y). taking the x, or first component, of each ordered pair gives   -2, 0, 2, 3.

you,

mrb

to find the total number of combinations, multiply the quantity of each item by each other:

2 pairs of shoes x 3 pairs of shorts = 6 different combinations.