Mylee is a stamp collector and buys commemorative stamps. Suppose she buys a combination of 47-cent stamps and 34-cent stamps at the post office. If she spends exactly $21.55 on 50 stamps, how many of each type did she buy?

The probability that an adult possesses a credit card is .70. a researcher selects two adults at random. by assuming the independence, the probability that the first adult possesses a credit card and the second adult does not possess a credit card is: