Ablood bank asserts that a person with type o blood and a negative rh factor (rh−) can donate blood to any person with any blood type. their data show that 45% of people have type o blood and 15% of people have rh− factor; 49% of people have type o or rh− factor.
find the probability that a person has both type o blood and the rh− factor.

Acompany manufactures large valves, packed in boxes. a shipment consists of 1500 valves packed in 75 boxes. each box has the outer dimensions 1.2 x 0.8 x 1.6 m and the inner dimensions 1.19 x 0.79 x 1.59 m. the boxes are loaded on a vehicle (truck + trailer). the available capacity in the vehicle combination is 140 m3. each valve has a volume of 0.06 m3. - calculate the load factor on the box level (%). - calculate the load factor on the vehicle level (%). - calculate the overall load factor (%).