What is both possible and impossible at the same time?

What does this say?

XLR8

what's the probability of getting a king or a queen from a pack of 52 cards?

Decode below rebus
D
N
A
T
S , D

Rahul decided to meet Simran so he boards a local train from Bombay station. Just after the station, there is a 1km long tunnel. The train starts and is now accelerating. Rahul is a claustrophobic guy, so what is the best position for him to sit?

A person was killed at a house party. When the police arrive, there are six people present in the house who are the friends of the victim. The name of the friends is Rohit, Aman, Nick, Gagan, and Randy.

Near the dead body, they find a few numbers written with blood by the victim on the floor. The numbers are 8, 5, 4, and 11.

The police arrests one of the friends for the murder. Whom did they arrest and why?

They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?

What Does this text mean:

important=important

Christina is practising her dance steps along with her friends. In a particular sequence, all of them form a row. At that point, Niharika is standing in the 4th position from either end of the row.
Can you find out how many girls are practising together?

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?