The diameters of bolts produced by a particular machine follow a normal distribution with mean 1.34cm and standard deviation 0.04cm.A bolt is rejected if its diameter is less than 1.24 or more than 1.40cm.i.Find the percentage of bolts which are accepted.

4 answers

Use the link that I had given you before for other problems of this kind
http://davidmlane.com/normal.html

Just enter the mean and SD, click on between and enter the data

Let me know what your answer is, I got one
I got 0.927 which is required answer.
A farmer cuts hazel twigs to make into beam poles to sell at the market.He says that the sticks are each 240cm long but in fact the lengths of the stick are normally distrinuted such that 55% of the sticks are longer than 240cm and 10% are longer than 250cm.Find the probability that a randomly selected stick is shorter than 235cm.

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Correct for this one,
I also did the other one
If the new mean is 1.32 , find the percentage of bolts that are rejected because they are too small in diameter.Sd remains same.