Of 1000 students, 530 were boys and 180 had bicycles. of those who had bicycles, 30 were girls. what is the probability that a student surveyed was a boy or had a bicycle?

You’re ordering more thread for blue jeans co. you usually purchase from ted’s threads, which sells 12 thread spools for $27. you recently received a notice from wade's wares that says you can buy thread from them for $2.30 each for the first 2 dozen and $2 a spool thereafter. you need to order 5 dozen spools. what percentage can you save by going with wade’s wares?