रासायनिक आबन्ध तथा आण्विक संरचना | Class11 रसायन विज्ञान | 10 AM Class By Nishtha Ma'am | L2 |

12 PM Special Class | Class 11 - STRUCTURE OF ATOM || BOHR MODEL By Yakshu Ma'am

In class 12 there are 8 students. In class 11 there are 6 students .In class 10 there are 5 students . Total ways of selecting 10 students , such that there are at least 2 students from each class and at most 5 students from 11 students of Class 10 and 11 combined is 100k. Then find value of k

There are 5 students in class 10, 6 students in class 11 and 8 students in class 12. If the number of ways, in which 10 students can be selected from them so as to include at least 2 students from each class and at most 5 students from the total 11 students of class 10 and 11 is 100 k, then k is equal to _______.

Two cars X and Y start from places A and B respectively which are 700 km apart at 9 a.m. Both the cars run at an average speed of 60 km/hr. Car X at stops 10 a.m. and again starts at 11 a.m. while the other car continues to run without stopping. The two cars cross each other at 2: 40 pdotmdot b. 3: 20 pdotmdot c. 4: 10 pdotmdot d. 4: 20 pdotmdot

Tabulate , the given data by taking Class intervals : 1-10 , 11- 20 , 21- 30 , 31- 40 Data : 9 , 10 , 8 , 6 , 7 , 4 , 3 , 2, 16 , 28 , 22 , 36 , 24 , 18 , 27 , 35 , 19 , 29 , 23 , 34.

Pipes A and B can fill a tank in 16 hours and 24 hours, respectively, and pipe C alone can empty the full tank in x hours. All the pipes were opened together at 10.30 a.m., but C was closed at 2:30 p.m. If the tank was full at 8:30 p.m. on the same day, then what is the value of x ? पाइप A और B किसी टंकी को क्रमशः 16 और 24 घंटे में भर सकते हैं , तथा पाइप C अकेला भरी हुई टंकी को x घने में खाली कर सकता है | सभी पाइपों को सुबह 10 : 30 बजे एक साथ चालू किया गया, लेकिन 2 : 30 pm में C को बंद कर दिया गया | यदि टंकी उसी दिन 8 :30 pm में भर गई, तो x का मान ज्ञात करें |