Date Page
7.
a
A bag contains 6 black and 7 white
marbles of same shape and size two
marbles are drawn randomly on offer
another without replacement show the
probabilities of all possible outcomes
a tree diagrams.
​

the probabilities are just

6/13 * 5/12 for two black marbles

6/13 * 7/12 for a black marble first, white second

7/13 * 6/12 for a white marble first, black second

7/13 * 6/12 for two white marbles

the 13 is just the summ of all marbles and the 12 is when we alrdy took one out of the bag. 5, 6 and 7 are the current numbers of marbles of some color respectively

your answer is the frist one

hop i

b) 1/3 * 1/5

step-by-step explanation:

each smallest part is 1/15 since the written one is 1/5 and it's divided by 3 equal parts. (1/5 )/3 = 1/15 = 1/3 * 1/5