Question

A bag has 2 red marbles, 1 blue marble and 4 gold marbles. What is the probability of drawing two gold marbles, if the first marble is replaced after it is drawn?
A) 2/7
B)16/49
C)4/7
D)7/13

Answer 1

$|\Omega|=7^2=49\\ |A|=4^2=16\\\\ P(A)=\dfrac{16}{49}\Rightarrow \text{B}$