A group of investors has been classified according to whether they own stocks (S), bonds (E), or mutual funds (M). The results are presented in the...

A group of investors has been classified according to whether they own stocks (S), bonds (E), or mutual funds (M). The results are presented in the diagram below. How many own exactly one of these three types of investments or do not own both stocks and bonds?

Answer Key is 175. Please explain. Venn diagram is attached file.