Hey, does anyone know how to do this problem?
3. The distance in metres that a ball can be thrown by pupils at a particular school follows a normal
distribution with mean 35.0m and standard deviation 11.6 m.
(i) Find the probability that a randomly chosen pupil can throw a ball between 30 and 40 m. [3]
(ii) The school gives a certificate to the 10% of pupils who throw further than a certain distance.
Find the least distance that must be thrown to qualify for a certificate. [3]
...........I got the first part ,but dunno how to do the second..............
3. The distance in metres that a ball can be thrown by pupils at a particular school follows a normal
distribution with mean 35.0m and standard deviation 11.6 m.
(i) Find the probability that a randomly chosen pupil can throw a ball between 30 and 40 m. [3]
(ii) The school gives a certificate to the 10% of pupils who throw further than a certain distance.
Find the least distance that must be thrown to qualify for a certificate. [3]
...........I got the first part ,but dunno how to do the second..............