The random variable X, representing the number of errors per 100 lines of software code, has the following probability distribution: x 2 3 4 5 6 f(x) 0.01 0.25 0.4 0.3 0.04 Using Theorem 4.2 on page 121, find the variance of X.

d.

explanation:

the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.

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