You are working to differentiate yourself from the competition, to show admissions that you can hack it, to show that you really want it...
Did you know that 140 b-schools require admits to go through an online MBA prep program called MBA Math (
https://www.mbamath.com/)? The program covers Excel spreadsheets, statistics, accounting, finance, and microeconomics.
When you get admitted to b-school, an MBA Math subscription is purchased on your behalf. But why not purchase a subscription now, and send your transcript to admissions in a follow-up email?
If you weren't aware of MBA Math, you can bet that there are a lot of other applicants that don't know about MBA Math either. If I remember correctly, the MBA Math subscription costs about $150, and your transcript will be applicable to such schools as Stern, Kellogg, Georgetown, Stanford, McCombs, Owen, Tuck, Yale, Haas, etc. In the big picture, $150 is a small price to pay to differentiate yourself from the competition.
If you didn't score well on the quant section of the GMAT, complete MBA Math. Don't leave admissions with a low GMAT score to judge you by. Complete MBA Math, and demonstrate that you can be successful in MBA-level quant courses. Module 1 at Georgetown includes microecon, financial accounting, and statistics (and the stats professor assumes you have mastered the first 9 chapters before the module starts--yes, the class covers chapters 10-17). Admissions is gauging whether you will be successful in the first module. You can give admissions a low quant GMAT score, and cross your fingers, or you can do more. You make the call.