रासायनिक अभिक्रियाएँ एवं समीकरण | Class 10 NCERT विज्ञान | 8 AM Class By Nishtha Ma'am | L5

Class 10 Science (Hindi) | Chapter 1 | रासायनिक अभिक्रियाएँ एवं समीकरण | Important Questions | Quick Revision

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

Class 10 Chemistry all Important रासायनिक समीकरण तथा Topic सिर्फ 15 मिनट में

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 _______.

Which two signs and numbers should be interchanged in the following equation to make it correct? निम्नलिखित समीकरण को सही बनाने के लिए कौन से दो चिन्हों एवं दो संख्याओं को आपस में बदलना होगा? 10 + 8 - 200 xx15 div 5 = 407

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

Ashok left from place A for place B at 8 a.m. and Rahul left place B for place A at 10.00 a.m. the dis-tance between place A and B is 637 km. If Ashok and Rahul are travelling at a uniform speed of 39kmph. and 47 kmph respectively, at what time wilt they meet? 5: 30 b. 4: 30 c. 5 p m d. 4 p m

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?