Hello,

Yes, you can be eligible for admission to Delhi University (DU) with marksheets from both ISC (Indian School Certificate) and NIOS (National Institute of Open Schooling). However, there are a few things you need to keep in mind:

1. Recognition of Boards: Both ISC and NIOS are recognized by DU, so your marksheets from these boards are valid for admission.

2. Combination of Marksheets: DU generally allows students to combine marks from different boards for admission purposes, as long as the subjects are recognized and meet the eligibility criteria. Since you have a marksheet from ISC and an NIOS On-Demand exam for Mathematics, you should be able to use both for your application.

3. Eligibility Criteria: Ensure that you meet the specific eligibility criteria for the course you are applying to. DU has specific requirements for percentage scores in particular subjects, which must be met. For example, certain courses may require a minimum percentage in Mathematics, so your NIOS marks will be considered in such cases.

4. Document Verification: During the counseling and admission process, your marksheets will be verified. As long as they are valid and meet the criteria set by DU, you should not face any issues.

5. Application Process: During the application process, you'll have to upload your marksheets from both ISC and NIOS. Make sure you fill out the forms carefully, indicating the correct marks and subjects from each board.

In summary, you can apply for admission to DU with marksheets from ISC and NIOS. Just ensure that you meet the specific course requirements and provide all necessary documents during the application and counseling process.

Hope it helps!