Question

There are three wpists in an office. Each typist
can lype an average of 6 letters per hour, If letters
arrive for being typed at the rate of 15 letters per
(a) What fraction of the time all the typists will
be busy?
(W) What is the average number of letters
waiting to be typed?
() What is the average time a letter has to
spend for waiting and for being typed?​

Answer 1

Answer:

OK please give brainliest please