Fair coin is tossed 25 times. what is the probability that at least 3 tails occur?

Julius sold five times as many computers as sam sold last year. in total, they sold 78 computers. how many computers did julius sell?

What are the exclude value of mn+3m

Apassenger train and a freight train leave san jose at 3pm, traveling in the same direction. the passenger train is going three times as fast as the freight train. at 6pm they are 240 miles apart. how fast is each travelling? explain your answer and show your