A bag contains 5 blue marbles 6 red marbles and 9 green marbles two marbles are drawn at random one at a time and without replac

Question

VashaNatasha [74]

3 years ago

7

A bag contains 5 blue marbles 6 red marbles and 9 green marbles two marbles are drawn at random one at a time and without replac

ement what is the probability of selecting two red marbles

Mathematics

2 answers:

Airida [17] · Answer 1 · 2022-03-15T05:53:16+03:00

Airida [17]3 years ago

7 0

Answer:3/38

Step-by-step explanation:

yarga [219] · Answer 2 · 2022-03-15T03:50:59+03:00

Sample space={5 B + 6 R + 9 G} = 20 (all possible outcomes
Favorable outcome ={6 R} = 6

P(1st Drawing R) = 6/20 = 3/10
Once drawn and not replaced the total remaining marble = 19 and within the 19, there are 5 Red left. So
P(2nd Drawing R) = 5/19

P( 1st AND 2nd R) = (3/10)x(5/19) = 3/38 = 0.0789