Hey there
Yes you can do Bachelor of Business Administration course even if you have done your 12th class from science stream. The students have completed their 12th class whether from Arts Commerce or science stream are eligible for doing Bachelor of Business Administration which is a 3 year duration course.
For more: https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.careers360.com/courses/bba-bachelor-of-business-administration/amp&ved=2ahUKEwjyjc-T25D0AhXBcn0KHfTGCEIQFnoECAQQAQ&usg=AOvVaw210B3Dsj6oaMwuCtQSqNC_&cf=1
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