minerals produced from mines 1, 2, 3 and are independent normal random variables with means 80, 90, 75 pounds, respectively. what is the probability that the combined amount of mineral produced from all three mines exceeds 283 pounds? [Hint: use sum random variable Y = X1 + X2 + X3

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answer is .0351
you may need to use linear combinations

What would be the constant? To you take out 1 mineral/mine or what?

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