Warning: implode(): Invalid arguments passed in /www/wwwroot/jobquiz.info/mdiscuss.php on line 336
In a class, there are 15 boys and 10 girls. Three students are selected at random. The probability that 1 girl and 2 boys are selected, is: ?->(Show Answer!)
Question Set

1. In a class, there are 15 boys and 10 girls. Three students are selected at random. The probability that 1 girl and 2 boys are selected, is:





Ask Your Doubts Here

Type in
(Press Ctrl+g to toggle between English and the chosen language)

Comments

  • By: guest on 01 Jun 2017 05.47 pm
    Let S be the sample space and E be the event of selecting 1 girl and 2 boys. Then, n(S) = Number ways of selecting 3 students out of 25 = 25C3 ` = (25 x 24 x 23) (3 x 2 x 1) = 2300. n(E) = (10C1 x 15C2) = 10 x (15 x 14) (2 x 1) = 1050. P(E) = n(E) = 1050 = 21 . n(S) 2300 46
Show Similar Question And Answers
QA->There are 50 students in a class. In a class test 22 students get 25 marks each, 18 students get 30 marks each. Each of the remaining gets 16 marks. The average mark of the whole class is :....
QA->The ratio of number of boys and girls in a school is 4: If there are 480 boys in the school. Find the number of girls in the school?....
QA->he average weight of 16 boys in a class is 25 kg and that of the remaining 8 boys is 15 kg. Find the average weights of all the boys in the class.....
QA->Average height of 10 students in a class is 150 cm. A boy of height 160 cm left the class and a boy of height 148 cm is admitted. Then what is the average height of the students in the class now?....
QA->In a class of 60 students 55% are boys. The number of girls in the class is :....
MCQ->In a class, there are 15 boys and 10 girls. Three students are selected at random. The probability that 1 girl and 2 boys are selected, is:....
MCQ->In a class there are 15 boys and 10 girls.Three students are selected at random.The probability that 1 girl and 2 boys are selected is....
MCQ->In a class of 60 students, the number of boys and girls participating in the annual sports is in the ratio 3 : 2 respectively. The number of girls not participating in the sports is 5 more than the number of boys not participating in the sports. If the number of boys participating in the sports is 15, then how many girls are there in the class ?....
MCQ->what is the total number of students (male and Female) in the class? I. the average weight of the students of the class is 61.08 kg. the average weight of male students is 63 kg and the average weight of the female students is 59 kg. The difference between number of male students and number of female students is 3. II. The respective ratio of number of male students and number of female students in the class is 13:12.....
MCQ->In a class, there are 18 boys who are over 160 cm tall. If these constitute three-fourths of the boys and the total number of boys is two-thirds of the total number of students in the class, what is the number of girls in the class ?....
Terms And Service:We do not guarantee the accuracy of available data ..We Provide Information On Public Data.. Please consult an expert before using this data for commercial or personal use | Powered By:Omega Web Solutions
© 2002-2017 Omega Education PVT LTD...Privacy | Terms And Conditions
Question ANSWER With Solution