Originally Posted by

**marky001** Hi all,

I am new here but am coming to the end of the first year of my course so will probably be posting loads of questions over the next few weeks!! The first on I am struggling with is a probability question.

*A package contains 80 similar components and inspection shows that four have been damaged during transit. If six components have been drawn at random from the contents of the package determine the probability that in this sample*

*a) one and*

*b) Less than three*

*are damaged.*

I thought that I could solve this by calculating the probability that one component is damaged on a draw and multiplying by six

i.e. 76/80 * 75/79 * 74/78 * 73/77 * 72/76 * 4/75 = 0.041

0.041 * 6 = 0.25

This has been marked wrong. I tried something similar for question b but that was also marked as wrong. Can anyone help??

Thanks in advance,

Mark