BECAusE hEr tEst turnED out to BE morE DiFFiCult thAn shE intEnDED it to BE, A tEAChEr DECiDED to ADjust thE grADEs By DEDuCting only hAlF thE numBEr oF points A stuDEnt missED、For ExAmplE, iF A stuDEnt missED 10 points, shE rECEivED A 95 instEAD oF A 90.BEForE thE grADEs wErE ADjustED thE ClAss AvErAgE wAsA、whAt wAs thE AvErAgE AFtEr thE ADjustmEnt