Before 350 companies are awarded ISO 9002, few officers are assigned to check all the items manufactured by the companies. After the inspection, the officers prepared a report as follows: x companies had non-defective(N) items only, y companies had partially defective(P) items only, 26 companies had defective (D) items only, 60 companies had non-defective and partially defective items 45 companies had non-defective and defective items 75 companies had defective and partially defective items 15 companies had non-partially and defective items Represent the above information in a Venn diagram. (i) If the number of company that had non-defective items is more by 10 than those companies that had partially defective items, derive a pair of simultaneous equations in x and y. (ii) Solve the equations in (i). (iii) Find the number of companies that had non-defective or defective items.

Before 350 companies are awarded ISO 9002, few officers are assigned to check all the items manufactured by the companies. After the inspection, the officers prepared a report as follows: x companies had non-defective(N) items only, y companies had partially defective(P) items only, 26 companies had defective (D) items only, 60 companies had non-defective and partially defective items 45 companies had non-defective and defective items 75 companies had defective and partially defective items 15 companies had non-partially and defective items Represent the above information in a Venn diagram. (i) If the number of company that had non-defective items is more by 10 than those companies that had partially defective items, derive a pair of simultaneous equations in x and y. (ii) Solve the equations in (i). (iii) Find the number of companies that had non-defective or defective items.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Please assist with problem.
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The State of New York certifies firefighters throughout the state and must keep track of all of them, as well as of the state’s fire departments. Each fire department has a unique department number, a name that also identifies its locale (city, county, etc.), the year it was established, and its main telephone number. Each certified firefighter has a unique firefighter number, a name, year of certification, home telephone number, and a rank (firefighter, fire lieutenant, fire captain, etc.) The state wants to record the fire department for which each firefighter currently works and each firefighter’s supervisor. Supervisors are always higher-ranking certified firefighters. Construct a relational database for New York’s fire departments and firefighters.
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explain proper and improper handoffs.