**The amount of money bob earns has an expected value of $30,000 and a standard deviation of $3000. The amount fo money that his wife sandy earns has an expected value of $32,000 and and standard deviation of $5000. Determine the values eanring of this families:**

a) expected value

b) standard deviation

a) expected value

b) standard deviation

I have been told that these are independant and I have calculated the variance for part B but still cannot figure out what to do next.