Hello

No, there will be  no trouble/ problem even if you have scored less marks in your +1 or  class 11th , you can still score 80% or more in your class 12th or plus 2. I  myself had scored only 74 % in 11th and then scored 90.2 % in 12th , you too can do it :) but yes you will have to study hard and put efforts as you have  scored less in your +1 means your basic are a little  weak so just study with dedication, perseverance and you can definitely achieve your goal.

Follow the given below tips to score well in your +2/12th  board examination :-

---------) Go well through your textbooks

---------) While reading the book, underline the important points and then later make short notes

---------) Do go through the questions at the end of the chapter, just reading is not going to help.

---------) Follow a routine, it should be such that it moves around 3 important things i. e first studying, then practicing questions and finally revision.

---------) Focus relatively more on your weak subject so that you can make them strong

---------) Have daily, weekly and monthly goals like you will complete these topics today , these chapter by the end of the week and these many chapters by the end of the month

---------) Be practical in your approach. For example, if you need 4 days to complete a chapter but you plan to finish it in 1 day from scratch then that's not going to help you, at  the end of the day it will give you disappointment and down your morale, so be practical.

---------) Complete your syllabus at least 1 month before your board examination so that you can give it for revision and practicing questions

---------) solve previous year question papers :- it will be really of great help to you because you will know what type of questions are asked in the exam, their difficulty level , examination pattern etc

---------) Go through chapterwise and unitwise test and once you're done with the complete syllabus ,go through full mock test papers. And do at least 5-10 full mock test papers in each subject.

---------) practicing days full mock test papers will let you know the level of your preparation for your board examination .

---------) after each mock test analyse your performance to know your mistakes / weak areas , after that you need to work on improving them in the subsequent mock tests .

I hope that you find this helpful.

Thank you