Yesterday I bought a packet of inexpensive videotapes and wondered whether they might be defective. I learned that 20% of the packets in the store came from a now-bankrupt wholesaler, with an appalling record of supplying 15% defective tapes. The remaining packets came from new wholesaler, with a much improved record of only 1% defective tapes. What is the chance that the first videotape I draw from the packet is defective? (10 marks) b. As luck would have it, the first tape was indeed defective. Now what is the chance that the second tape I draw from the packet is defective? Explain