Question 1161428
with replacement it is (8/12)(8/12)=4/9 probability
without replacement, it is (8/12)(7/11)=14/33 probability.

For 100 parcels
50 are A with 80% on time, so 40 are on time
30 are B with 65% on time, so 19.5 are on time
20 are C with 40% on time, so 8 are on time
they add to 67.5 out of 100 or 67.5% probability.

The last part doesn't say which truck, so I will assume A--40/67.5 were from Truck A, so probability it was from A is 59.3%