4) It has been found that 62.1% of all unsolicited third class mail delivered to households goes unread. Over the course of a month, a household receives 100 pieces of unsolicited mail. a) What is the mean of the sample proportion of pieces of unread mail

The triangles are similar. what is the value of x? x=

Astandard deck of cards contains 52 cards. one card is selected from the deck. (a) compute the probability of randomly selecting a seven or king. (b) compute the probability of randomly selecting a seven or king or jack. (c) compute the probability of randomly selecting a queen or spade.

When you answer this can you explain