most of the students in cbse board exam write correct roll no in boxes but make a mistake while filling bubbles , i did exact opposite of this, will there be any problem???
Hello,
CBSE will find a way to correct it and provide you results. be careful and don't do like this ever in important exam. this is your duty to give details correctly. if anything goes wrong then it won't be board who will be responsible and neither be in loss. you will be !
so don't ever repeat it ever. counter check your sheet and if any mistake then say it to your invigilator.
Hope it helps!