भोजन के घटक - L5 | संतुलित आहार | CLASS 6 NCERT विज्ञान | 8 AM Class by Amba Ma'am

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

The average weight of some students in a class was 58.4kg. When 5 students having the average weight 62.8 kg joined the class, the average weight of all the students in the class increased by 0.55 kg. The number of students initially in the class were: एक कक्षा में कुछ छात्रों का औसत वज़न 58.4 किलो ग्राम था | जब 62.8 किलो ग्राम औसत वज़न वाले 5 छात्र इस कक्षा में आते हैं, तो कक्षा के सभी छात्रों का औसत वज़न 0.55 किलो ग्राम बढ़ जाता है | आरंभ में कक्षा में छात्रों की संख्या कितनी थी ?

The following is a list of size of shoes of 8 students of class VI :5, 6, 5, 4, 5, 4, 6 and 4. If the shoe size less than 5 is observed for girls, how many girls are there in the list ?

Train X leaves New York at 1 A.M. and travels east at a constant speed of x mph. If train Z leaves New York at 2 AM and travels east, at what constant rate of speed will train Z have to travel in order to catch train X at exactly 5: 30 A.M.? 5/6x b. 9/8x c. 6/5x d. 9/7x e. 3/2x

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?

P and Q are 120 km apart. A starts from P towards Q at 6 am. B starts from Q towards P at 11 am on the same day. A is 50% faster than B. They cross each other at 8 pm. A's speed (in km/hr) is 4 b. 5 c. 6 d. 4. 5