For M25 concrete, standard deviation = 4 MPa.Target mean strength = ? 👉 check hidden Answar
Anonymous Quiz
A) 29.0 MPa
B) 30.5 MPa
C) 31.6 MPa
D) 33.0 MPa
E) 35.0 MPa

2 comments

C.31.6Mpa
how to get the answer?show me