Classical mechanics is based on the principle of uncertainty and predicts all phenomena in terms of probabilities. It describes a sub-atomic world which is totally different from the world at macroscopic scales.​

A total solar eclipse is observed from the earth. At the same time an observer on the moon views the earth. She is most likely to see ($E$ denotes the earth)

What is classical physics?

Represent the union of two sets by Venn diagram for each of the following.

$X=\{x | x$ is a prime number between $80$ and $100\}$

$Y=\{y | y$ is an odd number between $90$ and $100\}$