How many collisions per second take place at the LHC?

Each beam consists of nearly 3000 bunches of particles, and each bunch contains as many as 100 billion particles. The particles are so tiny that the chance of any two colliding is tiny. When the bunches cross, there are up to 40 collisions between 200 billion particles. Bunches cross on average about 30 million times per second, so the LHC generates about 1 billion particle collisions per second