course Mth 151
q2.4.13: THe area outside of both A and B would be 7 because you would subtract the 25 from A with the 18 of B. Then you would determine A'UB' by understanding that it is everything other than the region that is common to both A and B. Therefore it now includes the 18 elements in B that are not in A and the 7 elements outside of both A and B. So you would take 40-18-7 to get 15 which is the region (A-B). *2 on confidence scale q2.4.18: I first drew my picture with my first circle representing the 5 he wrote, the second cirlce representing the 7 he produced, and the combined region representing the 2 he wrote and produced. So i took A-B region tog et my aswer, which is 3 *1 on confidence scale q2.4.25: I understand and followed very well."