Answer:
1/4
Step-by-step explanation:
A bag contains a total of 16 marbles
Red marbles = 8
Blue marbles = 8
The question says you pick randomly one marble and you return before picking another marble , which means, there is replacement.
Probability of picking the first red marble = 8/16
Probability of picking the second red marble = 8/16
Probability that both the first and second marble is red = 8/16 × 8/16
= 64/256 = 1/4
Therefore, the probability that both the first and second marbles are red = 1/4
