If a parent wants to leave 40 % to his 3 children do , niy also leave grandchildren

A parent wants to leave 40% of his estate, also leave some to his 7 grandchildren

Do all names have to mentioned, or how does it go/?
DOUS THE AMOUNT for grandchildre. Come out of the total amount or just added to the 4O %

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

The american academy of pediatrics wants to conduct a survey of recently graduated family practitioners to assess why they did not choose pediatrics for their specialization. provide a definition of the population, suggest a sampling frame, and indicate the appropriate sampling unit.

Having a hard time understanding this question (see attachment).