You remove four fuses of 10, 20, 30, and 40 amperes each, but you do not mark the corresponding circuits. If you insert the fuses so that each sequence is equally likely, what is the probability that the appropriate amperage fuse is assigned to all the circuits

The evening newspaper is delivered at a random time between 5: 30 and 6: 30 pm. dinner is at a random time between 6: 00 and 7: 00 pm. each spinner is spun 30 times and the newspaper arrived 19 times before dinner. determine the experimental probability of the newspaper arriving before dinner.