Can someone please verify if this is correct?

4. The electronics store where you work sells MP3 players with scroll wheels that fail in 0.5% of the units. You just received a shipment of 50 players. n - x a) What is the probability that one of the units will be defective? [A2 marks] P = 0.195 = 0.0 05 P(x)= 506 60. 9 9 94 (osos) 1 - 50 - 12 X - 1 P (x ) = 0. 152 79 b) What is the most likely number of returns you should get? [A2 marks] 2.15278 = 0. 00305 5 6 defective bulbs. If 10 bulbs are used, what is the probability that none of the