In a regular deck of cards calculate the probability that a face card is drawn given that it is a heartnevermind it the answer is d=0.23 or 23%

Aparticular telephone number is used to receive both voice calls and fax messages. suppose that 25% of the incoming calls involve fax messages, and consider a sample of 25 incoming calls. (a) what is the expected number of calls among the 25 that involve a fax message?