Question 1178617
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Hi
{{{z =blue (x - mu)/blue(sigma)}}}
so no more than  4% of the tires will have to be replaced:
InvNorm(.96) = 1.75
{{{2050*1.75 + 47900 = blue (x)}}}
  x = 51487.5
What minimum guaranteed mileage should the manufacturer announce?
 51,487

Wish You the Best in your Studies.
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