Well you can write IAS exam there is no specification regarding the marks scored in your graduation.The following are the eligible criteria for writing this exam�� You must complete your graduation.�� You must be an Indian.�� Your age must lie between + General category : 21 - 30 years. + OBC : 21 - 33 years. + SC & ST : 21 - 35 years�� Number of attempt : + General category : 4 + OBC : 7 + SC & ST : No limit.�� You must not have any criminal record.