Assume, on a certain day, 50% of visitors of a store purchase at least one merchandise. If a sample of 100 visitors of the store (on that day) were randomly chosen, what's the probability that at most 60% of visitors in the sample would purchase a merchandise? Select one: O = 0.02281 O = 0.9821 O = 0.47721 O = 0.86491The genetic origin and properties of maize (modem-day corn) was investigated in Economic Botany (Jan.-Mar. 1995). Seeds from maize ears carry either single spikelets or paired spikelets, but not both. Progeny tests on approximately 600 maize ears revealed the following information. Forty percent of all seeds carry single spikelets, and 60% carry paired spikelets. A seed with single spikelets will produce maize ears with single spikelets 29% of the time and paired spikelets 71% of the time. A seed with paired spikelets will produce maize ears with single spikelets 26% of the time and paired spikelets 74% of the time. Assume two maize ear seeds are randomly selected. The probability that one of them produce ears with paired spikelets and the other one produce ears with single spikelets is Select one: O None O 0.2721 0.1980161 O 0.7281 O 0.7975