Probability problem about a parking lot

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We want to design a parking lot for a group of 200 apartments still under construction. It is known that for each department (from city statistics) the number of cars will be 0, 1 and 2 with probabilities 0.1, 0.6 and 0.3 respectively. It is desired that with 95% certainty there will be space available for all cars when apartments are sold. How many parking spaces should be built?