बल तथा दाब | CLASS 8 विज्ञान | 5 PM Class by Nishtha Ma'am | L3 | Hindi Medium

Thirty children were asked about the number of hours they watched TV programmes in the previous week. The results were found as follows: 1 6 2 3 5 12 5 8 4 8 10 3 4 12 2 8 15 1 17 6 3 2 8 5 9 6 8 7 14 12 (i) Make a grouped frequency distribution table for this data, taking class width 5 and one of the class intervals as 5 - 10. (ii) How many children watched television for 15 or more hours a week?

There are 5 brilliant students in class XI and 8 brilliant students in class XlIl.Each class has 50 students.The odds in favour of choosing the class XI are 2:3. One of the classes is chosen randomly and then a student is randomly selected.Find the probability of selecting a brilliant student.

In a class 80 students the boys and girls are in the ratio of 5 : 3. The students can speak only Hindi or Engish or both Hindi and English. The number of boys and the number of girls who can speak only Hindi is equal and each of them is 40% of the total number of girls. 10% of the girls can speak both the languages and 58% of the boys can speak only English What percentage of boys and girls can speak only Hindi?

In a class of 50 students, 23 speak English, 15 speak Hindi and 18 speak Punjabi. 3 speak only English and Hindi, 6 speak only Hindi and Punjabi and 6 speak only English and Punjabi. If 9 speak only English, then how many speak all the three? (a) 1 (b) 2 (c) 3 (d) 5

Distribution of marks obtained by 100 student of a class is given below . Find out the median marks {:("Marks",0,5,10,15,20,25,30,35,40,45),("Number of Students",4,6,15,5,8,12,28,14,3,5):}

Akash ranks eighth from the top and thirty from the bottom in a class. How many students are there in the class? 1) 35 2) 37 3) 39 4) 34 5) None of these

The average age of students of a class is 15.8 years. The average age of boys in the class is 16.4 years and that of the girls is 15.4 years. The ratio of the number of boys to the number of girls in the class is (a) 1 : 2 (b) 2 : 3 (c) 3 : 4 (d) 3 : 5