At a family reunion, there were only blood relatives, consisting of children, parents, and grandparents, in attendance. There were 400 people total. There were twice as many parents as grandparents, and 50 more children than parents. How many children, parents, and grandparents were in attendance

70

Step-by-step explanation:

let x = no of children, y = no of parents, z = no of grandparents.

so according to question condition ... y = 2z, x = y+50 and x+y+z = 400.

hence on solving above all three equation ...

x = no of children = 190 Answer

y = no of parents = 140 Answer

z = no of grandparents = 70 Answer