An electronic salesperson carries 6 identical amplifier

Last updated: 7/10/2022

An electronic salesperson carries 6 identical amplifier tubes, 5 identical rectifiers, 2 identical condensers, and 4 identical relays. In how many different ways can these parts be arranged in a row? 6.5.2.4 17!/(6.5.2.4) 17!/(6!5!2!4!)