in a group of 40 ballpoint pens on a shelf in a stationery department of metro department store, 2 are known to be defective if a costumer selects 3 of these pens what is the probability that at least one is defective

it is probab;y a simple answer you just  

vertical=18cm horizontal=18cm hypotenuse=25.5

step-by-step explanation:

answer: i could not see part the question so ill explain how to get the answer

step-by-step explanation: for instance the distance she travele d is 10 and she traveled the same amout each mile so do 10 divided by how many miles she drove each time and you ge your answer.