Isaac has 10 coins in a bowl. There are 4 quarters, 3 nickles, and the rest are pennies. Without looking, he grabs one coin, puts it back, and then grabs another coin.
What is the probability that both coins he grabs are quarters?
4/10*4/10 = 16/100 = 4/25 Is this the correct way to solve this problem?
3/25
2/15
4/25
16/49