A study looking at cancer of the uterus in women compared cases with non-cases, and found that 90/150 cases used contraceptive pills compared with 60/150 of the non-cases (those who do not use...

A study looking at cancer of the uterus in women compared cases with non-cases, and found that 90/150 cases used contraceptive pills compared with 60/150 of the non-cases (those who do not use contraceptive pills).

a) What is the odds of exposure in the control group?

b) What is the odds of exposure in the case group?

c) The Odds Ratio is________.