A particular fruit's weights are normally distributed, with a mean of 255 grams and a standard deviation of 10 grams. The heaviest 9% of fruits weigh more than how many grams?

Answer 1

X =mu+ (standard deviation x z)

X = 255 + (10 x 1.74) [at 91% or z value is 1.74]

= 272.4 gm

So heaviest 9% of fruits will weight more than 272.4 gm