The sum of 2 numbers is 36. Their difference is 24. Find the numbers.

Suppose i flip two identical coins. what is the probability that i get one head and one tail?

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?

Two years ago a man was six times as old as his daughter. in 18 years he will be twice as old as his daughter. determine their present ages.