Two unbiased dice are rolled once. Let A1 be the event "sum of points obtained is an odd number" and A2 the event "one of the faces shown is an ace". Obtain a) P(A1 U A2 ) b) P(A1 ? A2 ) c) P(A1 ? A'2 )

When george started his current job, his employer told him that at the end of the first year, he would receive two vacation days. after each year worked, his number of vacation days will double up to five work weeks (25days) of payed vacation. how many vacation days will he have in 4 years