Hi Dear,
It is very important to solve previous year paper before appearing for exam for best preparation. You can get The Bihar School Examination Board 10th previous year paper easily by doing a google search. There are many websites from which you can directly download past year paper in pdf form.
You can also visit the link below to download the question paper:
https://school.careers360.com/download/sample-papers/bseb-10th-model-question-papers-social-science
Good Luck
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