Determine the expected value for the following game. Cost to play the game is $3.00 You will roll a single die. If you roll a 5 or a 6 you will win $4.00 If you roll a 1 you will win $7.00​

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?