Example 2 A card is randomly selected from a standard deck of cards. What is the probability that either a heart or a face card is selected?+ Example 3 Teri attends a fundraiser at which 15 T-shirts are being given away as door prizes. Door prize winners are randomly given a shirt from a stock of 2 black shirts, 4 blue shirts, and 9 white shirts. Teri really likes the black and blue shirts, but is not too keen on the white ones. Assuming that Teri wins the first door prize, what is the probability that she will get a shirt that she likes?+ Example 4 An electronics manufacturer is testing a new product to see whether it requires a surge protector. The tests show that a voltage spike has a 0.2% probability of damaging the product's power supply, a 0.6% probability of damaging downstream components, and a 0.1% probability of damaging both the power supply and other components. Determine the probability that a voltage spike will damage the product.~ Example 5+ The following table illustrates the distribution of elementary and secondary school enrolment in public and private institutions in Canada in 1977. Province/Territory Public Private Newfoundland 157 8034 2934 PEI 27 9194 Nova Scotia+ 201 759 3 1 410( New Brunswick 163 3174 3934 Quebece 1 319 511+ 86 1104 Ontario 1 974 2664 58 2264 Manitoba+ 255 854- 7 6424 Saskatchewant 219 327+ 1 5734 Alberta 441 2554 6 070- British Columbia 536 4814 23 3184 Yukone 4 8664 NWTO 12 916+ Total: Canada 5 285 274- 185 0354 If a Canadian student was selected at random, what would be the probability that the student was:+ a) from Ontario?+ () from the public system?" b) from either Ontario or Quebec?+ d) from either Ontario or the Private system