Question

A bag has 5 red marbles, 6 blue marbles and 4 black marbles. What is the probability of picking a red marble, replacing it, and then picking another red marble?



A bag has 5 red marbles, 6 blue marbles and 4 black marbles. What is the probability of picking a
blue marble, replacing it, and then picking a black marble?


A bag contains 4 white marbles, 3 black marbles, and 5 red marbles. Find the probability of picking a red marble?


A bag contains 3 white marbles, 2 black marbles, and 5 red marbles. Find the probability of picking a white marble?

Answer 1

I Know the answer i just need check up

Answer 2

1)Red ----> 5/15 * 5/15 = 1/3 * 1/3 = 1/9

2) Black -----> 4/15 * 4/15

3) Red once ----> 5/12

4) White once ----> 3/10

Answer 3

P(Event) = No. of preferred outcomes/Total no of outcomes

Answer 4

16/225 for the second one?

Answer 5

like what is it reduced too for the 2nd question