1.) A manufacturing company performs a quality-control analysis on the ceramic tile it produces. Suppose a batch of 15 tiles has 7 defective tiles. If 3 tiles are sampled at random, what is the probability that exactly 1 of the sampled tiles is defective?

How many ways can 3 tiles be selected from 15 tiles?

(Type a whole number.)

The probability that exactly 1 of the sampled tiles is defective is___

(Round to four decimal places as needed.)