Amazon calculates a product's star ratings based on a machine learned model instead of a raw data average. The model takes into account factors including the age of a rating, whether the ratings are from verified purchasers and factors that establish reviewer trustworthiness.
I HAVE FOUND 3 INCHES CRACK IN THE KATARIA Genuine Black PVC ID Card Tray, AND THE RS. 470/- PRODUCT QUALITY IS SAME AS RS. 200/-, THIS TIME IT WAS A VERY VERY BAD AND UNEXPECTED EXPERIENCE WITH AMAZON, I DO NOT WANT TO CLAIM TO CHANGE THE PRODUCT.