Hi, I wondered if someone on here could kindly help with one of my maths questions for my course as I can't seem to get my head round this and am hopin someone could put me in the right direction if possible, heres the question.......

The Lengths of pins produced by a machine follow a normal distribution with mean of 2.54cm and a standard deviation of 0.04cm. A pin is rejected if the length is less than 2.44cm or more than 2.60cm

a) What is the percentage of pins accepted

b) If it is decided that 2.5% of the pins are to be rejected because they are too short and 2.5% because they are too long, what is the new range of acceptable lengths

Would really appreciate any help on this