The arithmetic mean of the data $(x,f):(8,5),(10,8,(15,8),(20,4)$ is:
1). 12.5
2). 25
3). 12.4
4). 12.8
4. Meena’s mom can best described as
5. The most effective method to teach the concept of germination of seeds is
6. The decimal number 1.23657657657657.. is equal to the rational number
7. If (x) is an even function, then f(x) is
8. वाकया का शुद्ध रूप का चयन करे