It is observed that a person going to petrol pump for refueling checks air pressure of the tyres 12% times, and checks the level of engine oil and brake oil 29% of the times. It is also observed that 7% of the persons check both air pressure and the level of oil. (i) Calculate the probability that the person going to the petrol pump neither checks air pressure nor the level of oil. (ii) Calculate the probability that the person checks air pressure but not the level of oil.
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