Find σ. (Enter an exact number as an integer, fraction, or decimal.)
X ~ N(5, 3)

And from this case we can see that the deviation is given by:

Step-by-step explanation:

For this case we have the following notation given:

And from this we know that the distribution for the random variable is normal and we know that in general the normal distribution is given by:

And from this case we can see that the deviation is given by:

the least common denominator is 40