I have a bag of N white marbles. I paint 20 of the marbles black. Later, my sister pulls out 30 marbles and I tell her t
Posted: Mon Nov 15, 2021 10:07 am
I have a bag of N white marbles. I paint 20 of the marbles
black. Later, my sister pulls out 30 marbles and I tell her
that my best guess is that 7.5 of them will be black. How many
marbles are in the bag ?
black. Later, my sister pulls out 30 marbles and I tell her
that my best guess is that 7.5 of them will be black. How many
marbles are in the bag ?