Question 3 Not complete P Flag question There are 20 first grade children, 50 se

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Question 3 Not complete P Flag question There are 20 first grade children, 50 second grader children, and 35 third grade children in a school. What is the conditional probability of choosing a second grade child, given that either a first grade or a second grade child was chosen? Select one: a. 0.29 o b.0.71 . 0.48 O d. 0.19 Time Question 4 Nat complere Points out of s P Flag question A classic counting problem is to determine the number of different ways that the letters of "announce" can be arranged. Find the number of different ways that the letters of "announce" can be arranged is 1-0 Type here to search

Explanation / Answer

There are 20 1st grade, 50 2nd grade, 35 3rd grade in school.

P( choosing a 2nd grade given either 1st or 2nd grade was choosen)

= no. of 1st grader/ no, of 1st and 2nd graders

= (20)/(20+50)

=2/7

= .29

A is right answer

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