Define a set.

Natural numbers is the ------------- of Whole numbers.

(a)  

In the equation 3x + 4 = 28 , the variable is ------------- .

(a)  

Area of a Triangle is -------------- .

(a)  

In a right triangle ABC ,sin A = -------------- .

(a)  

This formula represents ---------------------- .

(a)  

While rolling a dice the sample space S is ------------- .

(a)  

Find the average of 8 , 3 , 7 , 5 ,2 , 6 , 4 is -------- .

(a)