Question: which of the following is not an example of ecommerce? a. downloading an app through itunes b. uploading a picture of your family to a popular website c. selling your old bike online d. giving a 5 star rating to a product you just bought (like in amazon)

Abag contains 4 red, 7 blue and 5 yellow marbles. event a is defined as drawing a yellow marble on the first draw and event b is defined as drawing a blue marble on the second draw. if two marbles are drawn from the bag, one after the other and not replaced, what is p(b|a) expressed in simplest form? a. 7/16 b. 7/15 c. 14/16 d. 14/15