Three boxes contain 50 parts each. one part in each box is defective. one part is selected at random from each of the three boxes. a.) what is the probability that all three parts are non-defective? b.) what is the probability that the part selected from box 1 is defective, and the parts selected from box 2 and 3 are non-defective? c.) what is the probability that two parts are non-defective and one part is defective?

the correct option is 2.

step-by-step explanation:

according to the given information triangle abc is a right angle triangle with right angle at a. segment ab is 5 and segment ac is 7. point d is on segment bc and angles adb and adc are right angles.

it is given that triangles abd, cad, and cba are similar.

two triangles are similar if their corresponding sides are proportional.

in triangle cba, using pythagoras theorem

                      )

triangle abd and cba are similar,

                            (2)

triangle cad and cba are similar,

                      )

using (1), (2) and (3), we get

hence proved.

therefore option 2 is correct.