I am doing pretty badly on the IR section and my exam is in a few days. How important and what's the weight of this IR Section. The mba.com says it's evaluated separately so the score I will get right after the exam will not include the IR and AWA section, but say I have 3/8, what's the impact on my final GMAT score if I get say 620 right after I finish the GMAT?
There's no impact. As you pointed out - IR score is a separate score. So your 620 will still be a 620. In some instances your unofficial score may be off from your official score by +-10 pts - but it will not be affected by your IR performance.
For extra practice on IR, see: http://www.gmatpill.com/gmat-practice-t ... -reasoning
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