A chef at a deluxe and very expensive restaurant in Paris is world-famous for his omelets. There is pepper and curry powder in the restaurant kitchen. If the chef uses both pepper and curry powder, the omelet will be too spicy. If he uses neither, then the omelet will be too bland. If the chef uses exactly one of the two spices, the omelet will taste good. The probability that the chef uses pepper is 0.4 and the probability that he uses curry is 0.6. The probability that he uses both types of spices is 0.1. What is the probability that the omelet will taste good?