WHY is business class located in the front of the plane if it's safer in the back?
The probability of surviving a crash in the back of a plane is not much higher than in the front seats, only a few percent. Considering that plane crashes are rare (once per million flights), this difference can be neglected.
More important are the advantages of the front seat: quick landing and disembarkation, lower noise level and the view from the porthole, which is not obscured by the wing and the engines.