Hi Hoàng,
Thanks for contacting Syncfusion support.
We have
confirmed the issue as "AVERAGEIF
formula returns wrong value as a result in spreadsheet component "
and logged a bug report and it will be available in our First patch after Volume 4 release. You can track the status of the issue via the feedback link below.
Feedback
link for tracking purpose: https://www.syncfusion.com/feedback/49348/averageif-formula-returns-wrong-value-as-a-result-in-spreadsheet-component
You will be informed regarding
this once the fix is published.
Disclaimer: “Inclusion
of this solution in the weekly release may change due to other factors
including but not limited to QA checks and works re prioritization.”