Mathematics · Probability and Statistics
A concrete mix is designed for a characteristic strength of 35 MPa, with a 5% probability that an individual test result falls below it. If the standard deviation for the mix is 4 MPa and the acceptance factor is 1.65, determine the target mean strength.
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 135.0 MPa
- 239.0 MPa
- 336.6 MPa
- 441.6 MPa✓
Correct answer
41.6 MPa
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