Question 609902
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Hi, understand now You were referring to this Inquiry
monthly phone bill is normally distributed with a mean of $50 and a standard deviation of $10
What is the 25th percentile: (x-50)/10 = -.6745  ||Note: NORMSINV(0.25)= -.6745
 (x-50)/10 = -.6745
    x  = $43.26