Q:

In a string of 20 beads, the average weight of the first 14 beads is 25 grams and that of the last 6 beads is 8 grams. What is the average weight of all the beads?

• 1
  16.4 grams
• 2
  21.3 grams
• 3
  19.9 grams
• 4
  29.7 grams