Jamie bought 5/8 of wheat flour. he also bought 1/4 pound of white flour. how much flour did he buy?

The general form of the quetion of a circle is ax^2+by^2+cx+dy+e=0 where a=b=0 if the circle has a radius of three units and the center lies on the y axis which set of values of a, b, c, d, and e might correspond to the circle

Events a and b are independent. the probability of a occurring is 2/5. the probability of b occurring is 1/4. what is p(a and b)?

How can you check that you have correctly converted frequencies to relative frequencies?