Plotting several Gaussian distributions in Mathematica -

I am new to mathematics and I have found a problem.

How can I plot many Gaussian distributions using mathematica (the same variance)? For example, the second with the second, the second with the mean 5 and the other 7.

Thank you, beforehand.

You only have to use the plot evaluation table and introduce the vector with the tools of Gaussian distribution. . Here's the code:

  mu = {2, 5, 7}; Sigma = 2; Plot [table [pdf [general [contribution] [mu [[i]], sigma], x], {i, 1, length [mu]}], {x, -4, 15}]  / Ex>