A diamond can be classified as either gem dash quality gem-quality or industrial dash grade industrial-grade. Suppose that 87% of diamonds diamonds are classified as industrial dash grade industrial-grade.
?(a) Two diamonds diamonds are chosen at random. What is the probability that both diamonds diamonds are industrial dash grade industrial-grade?? ?
(b) Seven Seven diamonds diamonds are chosen at random. What is the probability that all seven seven diamonds diamonds are industrial dash grade industrial-grade??
?(c) What is the probability that at least one of seven seven randomly selected diamonds diamonds is gem dash quality gem-quality?? Would it be unusual that at least one of seven seven randomly selected diamonds diamonds is gem dash quality gem-quality??
?(a) The probability is ___. ?(Round to four decimal places as? needed.)
?(b) The probability is ____. (Round to four decimal places as? needed.)
?(c) The probability is ____. (Round to four decimal places as? needed.)