Let the characteristic strength be defined as that value. below which not more than $50 \%$ of the results are expected to fall. Assuming a standard deviation of $4 \mathrm{MPa}$. the target mean strength (in MPa) to be considered in the mix design of a M25 concrete would be
(A) 18.42
(B) 21.00
(C) 25.00
(D) 31.58

Question ID - 156703 | SaraNextGen Top Answer

Let the characteristic strength be defined as that value. below which not more than $50 \%$ of the results are expected to fall. Assuming a standard deviation of $4 \mathrm{MPa}$. the target mean strength (in MPa) to be considered in the mix design of a M25 concrete would be
(A) 18.42
(B) 21.00
(C) 25.00
(D) 31.58