Contrary to popular belief, there is no bell curve when marking PSLE papers. That is, no quota for the number of candidates who can get AL1 or AL2. Under the new system, marking falls under a natural bell curve instead.
In fact, according to the Ministry of Education (MOE), almost 50% of candidates achieve 75 marks (AL3) or higher. (Click here https://moenrichment.com/resource-readings/#PSLE-scoring to understand the PSLE Scoring System) Examiners are not rigid when marking the papers. They will deliberate over every answer and award marks accordingly.