Question 13 • CREDIT RE-SEAT MNPS Integrated Math III IC S2 26-27
Convert each score to a z-score using z = (score − mean) / standard deviation. For 350, z = (350 − 500) / 110 ≈ −1.36; for 550, z = (550 − 500) / 110 ≈ 0.45. The probability between them is 0.6736 − (1 − 0.9131) = 0.5867, or about 59%. The correct choice is C, 59%.
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