A model builder has 30 pieces of balsa wood in a box. four pieces are 15 in lon, 10 pieces are 12 in long, and the rest are 8 in long, what is the probability the builder will pull an 8inch piece from the box without looking?
total pieces of balsa wood in a box---------------- > 30 pieces 15 in lon----------------------------------------> 4 pieces 12 in lon----------------------------------------> 10 pieces 8 in lon----------------------------------------> (30-(10+4))=16
Let P--->the probability the builder will pull an 8 inch piece from the box without looking P=(pieces 8 in lon)/(total pieces)=16/30=0.5333=53.33%
