Question

a jar contains 10 marbles six marbles are red and four marbles are blue if two marbles are chosen one at a time with replacement what is the probability that both marbles will be red

Answer 1

30%

Explanation:

there is a 60% chance of getting a red marble each time. You need to choose a ball twice. 60/2=30. therefore there is a 30% chance of getting two reds.