Hi

For BSc hons microbiology

PCB scored is considered for DU admissions

In your case it will be

(87+70+80)/3 = 79%

"Once applicants have ascertained that they are eligible, they may examine the course-wise cut-off percentages posted on the University website for each Cut- Off list and choose from the colleges/courses that are available to them on their Dashboard" - DU university

https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.du.ac.in/du/uploads/COVID-19/pdf/Illustrative%2520examples%2520to%2520calcaulate%2520percentage.pdf&ved=2ahUKEwjR3bzImazzAhWH7HMBHT7zCtoQFnoECDIQAQ&usg=AOvVaw3buF8CJyENTFy4FLADI94X

Hope this helped!