Learn maths profit and loss concepts with formulas and tricks. Also, learn to calculate the complex problems based on selling price, cost price and marked price easily at BYJU'S.
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Here we have an entire industry of standardized testing that makes its money as a parasite on the public school system. The same multi-billion dollar corporations design the tests, grade the tests and then offer remediation when kids don’t pass the tests.It’s a classic captive marketwhere ...