The quantitative subtlest of the graduate record exam GRE ha

Solution

let, x= the score from which the prob. of occurence becomes 0.06 or less

then, z(0.06) = (x-500)/100 [ here we are calculating the upper 6% scores]

z(0.06) = 1.554774 =(x-500)/100 i.e (x-500) = 155.4774 i.e x = 655.4774

so, the score 655.4774 or more than this will occur with a prob. of 0.06 or less!