Evaluate 7C6 and 7P4,

If a || b and e || f , what if the value of y ?

Find the value of x. round the length to the nearest tenth

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?