Probability of computers sending data

Question

Considering the next sentence how am i supposed to calculate it?

There are 5 computers each with a probability of 0.6 of actually sending data. What is the probability that out of those 5 computers only one sends the data?

I know that the probability should be 1/5 if each computer has a 100% chance of sending data.

Answer 1

Hint: assuming the events (computer #$k$ sends data) are independent, the number of computers that send data has a binomial distribution. That assumption should have been stated.

Answer 2

If the probability of each computer sending data is 0.6 then the probability of each computer not sending data is 0.4. The probability of exactly one computer out of five sending data is $\begin{pmatrix}5 \\ 1\end{pmatrix}(0.6)(0.4)^4= 5(0.6)(0.0256)= 0.0768$.