The two-way table shows information about the subjects studied by some people. Chemistry Biology Physics Total Male 12 14 16 42 Female 16 20 12 48 Total 28 34 28 90 a) How many people are male OR study Biology OR both? b) What is the probability that any person is male OR studies Biology OR both?

I’m still confused on how to work the percentages

The architect's side view drawing of a saltbox-style house shows a post that supports the roof ridge. the support post is 8 ft tall. the distance from the front of the house to the support post is less than the distance from the post to the back of the house. how far from the front of the house is the support post positioned?

What multiplys to be 1 but adds up to be 4