Find the domain and the range of the following: x y
3 2
5 7
1 4
9 2
3 7

Given:

The table of values.

To find:

The domain and range.

Solution:

The set of input values or x-values are known as domain.

In the given table, possible values of x are 1, 3, 5 and 9. So,

Domain = {1, 3, 5, 9}

The set of output values or y-values are known as range.

In the given table, possible values of y are 2, 4 and 7. So,

Range = {2, 4, 7}

Therefore, Domain = {1, 3, 5, 9} and Range = {2, 4, 7}.

percentage - 25%

probability - 0.25

we know,

total amount of students in class = 20

total boys = 10

total girls = 10

no of girls who wear glasses = 10/2 = 5

probability of choosing a girl with glasses is =

number of girls wearing glasses/total number of students in the class = 5/20

thus, percentage of selecting a girl wearing glasses will be

= 5/20 × 100

= 5 × 5

25%

therefore,

probability will be 0.25

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