In a group of 20 boys and 18 girls, three people are chosen at random. What...
There are seven boys and three girls on a team. The coach must select four people from this group to participate in the championship. a. How many four-persons teams can be formed from the group of ten students? b. In how many ways can four boys be chosen to participate in the championship? c. What is the probability that four boys are chosen for the team? d. In how many ways can three boys and one girl be chosen to...
2.Exam-like questioin A class consists of 12 girls and 16 boys. Jane is one of the girls and Jonatharn is one of the boys. (i) In how many ways can we make a group of 2 girls and 3 boys? (ii) What is the probability that Jane is not in that group and Jonathan is? (iii) What is the probability that Jonathan is and Jane is not in a group of 5 students selected randomly out of the 28? (iv)...
One of two small classrooms is chosen at random with equally likely probability, and then a student is chosen at random from the chosen classroom. Classroom #1 has 5 boys and 13 girls. Classroom #2 has 15 boys and 9 girls. What is the probability that Classroom #2 was chosen at random, given that a girl was chosen? Your answers should be rounded to 4 digits after the decimal. A 0.6582 B 0.3418 C 0.1875 D 0.3750 E 0.2708 F...
52. In a class of 12 boys and 9 girls, the teacher selects three students at random to write problems on the board. What is the probability that all the students selected are boys? (Round your answer to four decimal places.)
1: The gender for 20 randomly selected births is recorded. Assuming boys and girls are equally likely, the probability of getting the three or more girls in a row is 0.7870 and the probability of getting three or more girls in a row or three or more boys in a row is 0.9791. What is the probability of getting three or more boys in a row and three or more girls in a row?
15) A classroom consists of 6 boys and 5 girls. A group of 4 students will be selected to work on a project. The group must include at least 1 boy and at least 1 girl. In how many different ways can this group be formed?
in a classroom theres 15 boys and 25 girls. what is probability 3 students get chosen and are girls?
There are 13 girls and 7 boys in Ms. Sally's 3rd grade class waiting to have their individual photos taken for the current school year. If two students are being randomly selected without replacement, find the probability the second child chosen is a girl. Give your answer as a decimal rounded to 4 decimal places. (Hint: In this problem you may need to consider two cases. In the first case, the first child chosen is a boy and then the...
if boys and girls are equally likely to be born what is the probability of a randomly selected family of 5 children having exactly 2 boys. Use the binomial probability function to find the answer.
In a study to compare the IQ between boys and girls in a particular elementary school, a random sample of seventh grade boys and girls was taken from Vancouver Hill Elementary School. The girls and boys were asked to take an IQ test and their scores were recorded. Some summary statistics of the IQs of the boys and girls is given below. Gender Number of children measured Average IQ Standard deviations of IQ Boys 17 107.1 5.6 Girls 15 105.5...