1. A Lot of 40 items contains exactly 3 defective items. If a sample of 10 items is to be drawn at random from the lot, find the probability of finding zero defective items.

2. A process generating 7.5% nonconforming items is sampled at random intervals in subgroups of 10 items. What is the probability that a given subgroup will contain zero defective items? (assume a continuous process, hence a large lot size).

**Subject Engineering Engineering - Other**