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It is known that 70% of the customers in a sporting goods store purchase a pair of running shoes. A random sample of 25 customers is selected. Assume that customers' purchases are made independently, and let x represent number of customers who purchase running shoes.
What is the probability that exactly 18 customers purchase running shoes?
______________
What is the probability that no more than 19 customers purchase running shoes?
______________
What is the probability that at least 17 customers purchase running shoes?
______________
What is the probability that between 17 and 21 customers, inclusively, purchase running shoes?
______________
Apical Meristem
A growth region in plants located at the tips of roots and shoots, where cells rapidly divide to enable growth.
Root Cap
A protective tissue at the tip of a plant root that helps the root penetrate the soil.
Pericycle
A cylinder of parenchyma or sclerenchyma cells just inside the endodermis of roots, which can give rise to lateral roots, and in some cases, contribute to secondary growth.
Branch Roots
Secondary or lateral roots that originate from the primary root, increasing the root system's overall surface area for water and nutrient absorption.
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