A box contains 20 crayons. There are seven red crayons, five yellow crayons, and the rest or blue crowns suppose an experiment involves a person removing three crayons from the box. What is the probability that the person first removes a blue crayon then a red crayon and finally a yellow crayon with replacement?

37

step-by-step explanation:

32

step-by-step explanation:

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.