Hello,
It depends on your future plans of higher studies. If you are taking admission in a college which take admission based on merit in 10+2 then this percentage will not be enough but if you are interested in a course which gives admission based on merit in entrance exam you don't need to appear but you must have minimum percentage to full fill the eligibility criteria you need to check that also. If you have enough percentage then you can go for pre board marks but if you require higher percentage then you need to appear in the exam. Consider the situation around you too.
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