Question
The mean score of 1000 students for an examination is 34 and standard deviation is 16.
(i) How many candidates can be expected to obtain marks between 30 and 60 assuming the normality of the distribution and
(ii) Determine the limits of the marks of the central 70% of the candidates
{P[0<z<0.25]=0.0987;P[0<z<1.63]=0.4484;P[0<z<1.04]=0.35}