Question
The average age of 20 girls is 54 years. If the age of
two more girls is added the average decreases by half a year. What is the sum of the age of new girls?Solution
Total age of 20 girls = 20 × 54 = 1080 years  If the age of two more girls is added the average decreases by half a year,  ∴ Total age of 22 girls = 53.5 × 22 = 1177  Now, sum of the age of new girls = 1177 – 1080 = 97 years
In a relational database, a foreign key is used to:
What does the term "normalization" refer to in the context of database design?
Which tier uses application server
Which of the following statements about ACID properties in a DBMS is incorrect?
A collection of Data organized in a manner that allows access, retrieval & use of the data
Which of the following is true about Information?
Which normal form deals with the issue of transitive dependencies?
 In database management, which SQL command is used to remove a table and all its data from a database?
Which of the following is used to speed up data retrieval in a relational database?
Which of the following storage devices is considered non-volatile?
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