statistics
posted by iyra .
In a local cellular phone area, company A accounts for 70% of the cellular phone market, while company B accounts for the remaining 30% of the market. Of the cellular calls made with company A 2% of the calls will have some sort of interference, while 3% of the cellular calls with company B will have interference. If a cellular call is selected at random, the probability that it will NOT have interference is_________?

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