There are 3 first grade children, 5 second grade children, and 7 third grade children in a room. When choosing two children, what is the conditional probability of choosing a second grade child, given that either a first or a third grade child was chosen first?

0.3571 or 35.14%

Step-by-step explanation:

There are 15 children in total in the class at first. Of those children, 5 are second graders and 10 are not.

If the first chosen children was not a second grader, there are 5 second graders among the 14 children left. The probability of selecting a second grade child is:

The probability is 0.3571 or 35.14%.

tube or goog would be a great resource to with that question

45

step-by-step explanation:

to find a percentage, add a decimal in front and multiply it by the other number.

.25 times 180= 45