Zaphod Beeblebrox has recently purchased a second-hand ballpoint pen business. In the first month, they purchased the following pens. Count 971 643 287 Color Black Blue Red Green 608 UltraViolet 340...

Extracted text: Zaphod Beeblebrox has recently purchased a second-hand ballpoint pen business. In the first month, they purchased the following pens. Count 971 643 287 Color Black Blue Red Green 608 UltraViolet 340 536 Purple What is the relative frequency of black pens purchased? I Answer in decimal form Round to 3 decimal places as needed