Q7 (4 points) Suppose that every time you turn on your XCube, it has a 1X20 chance of permanent failure Thus the probability that it fails on the first attempt is the probability it fails on 210 ' the second attempt is ( E} ) ( 210 ) the probability it fails on the third attempt is ( 21,3)2( 210) and so on.. Show that the probability that the system fails after an odd 20 number of attempts is equal to 39