Question

Please help, I'm not understanding this, I will give brainliest to the person who helps answer and maybe explain :)


the best way to put the solution is to say
1 to 3/5 * 5/9 to 1/3 or something like that, that was just an example ​

Answer 1

Step-by-step explanation:

all the tasks are the same type and have the same way of solution.

Example №1:
9[girls] + 11[boys]=20 persons. Then the probability to choose the first boy is: 11/20. After this choice, 9[girls]+10[boys]=19 persons. Then the probability to choose the 2-d boy is: 10/19. The final required probability is: 11/20 * 10/19 = 11/38.

P.S. all the details are in the attachment.

P.P.S. the suggetsted way is not the only one.