10 people go to a bake sale and bring 5 cakes each. 200 people have cake at the bake sale , how many people share one cake

Four congruent circular holes with a diameter of 2 in. were punches out of a piece of paper. what is the area of the paper that is left ? use 3.14 for pi

I’m really confused and need your assist me with this question i’ve never been taught

According to the general equation for conditional probability if p(anb)=3/7 and p(b)=7/8 what is p(a i b)