Question

I have two bags of counters.

The first bag contains two red counters and one blue counter.

The second bag contains one red counter, one blue counter and two yellow counters.


I take a counter at random from both bags.


A). What is the probability that the two counters will be the same colour?


b). What is the probability that exactly one of the counters will be red?

Answer 1

A) 3/12

B)7/12

Explanation:

I used a tree diagram to go through this with my daughter, bear in mind the second question asks for the probability of exactly one red counter to be taken from the bag.

Answer 2

a. 4/21

b. 4/7

Explanation:

Please kindly check the attached files for explanation.