The first and the most important advantage is that it
supports a simple data structure, mainly tables. Familiar to many users, the
table structure is an intuitive organization. Another main advantage of a
relational database as compared to others is better security. Once data are split into tables, certain
tables can be made confidential.
Explanation:
A class is called an object factory because objects are created from a class. An object is an instance of a class.
Let us consider a, b, c, d, e, f the six numbers.
If the average of 6 numbers is 19 then
(a + b + c + d + e + f)/6 = 19
=> a + b + c + d + e + f = 114 (1)
And if the average of 5 numbers is 20 then
(a + b + c + d + e)/5 = 20
=> a + b + c + d + e = 100 (2)
We will replace (2) in (1) And it will result that
100 + f = 114 => f=114, the sixth number.