जीवन की मौलिक इकाई | Class - 9 विज्ञान | 8 PM Class by Pooja Ma'am | L14 | Hindi Medium

Class 11 के बाद क्या ? Class 12 Hindi Medium की पढ़ाई साल के शुरू से कैसे करें ?

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

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?

Three Science classes A, B and C take a Life Science test. The average score of class A is 83. The average score of class B is 76. The average score of class C is 85. The average score of class A and B is 79 and average score of class B and C is 81. then the average score of classes A, B and C is- तीन विज्ञान की कक्षाएं A, B और C जीवन-विज्ञान को परीक्षा देती हैं। कक्षा A के औसत अंक 83 है। कक्षा B के औसत अंक 76 हैं। कक्षा C के औसत अंक 55 हैं। कक्षा A और B के औसत अंक 79 और कक्षा B और C के औसत अंक 81 है। कक्षा A,B और C के औसत अंक कितने है?

Consider the marks, out of 100, obtained by 51 students of a class in a test, given in Table 14.9. M a r k s"N u m b e r o f S t u d e n t s"0-10 5 10-20 10 20-30 4 30-40 6 40-50 7 50-60 3 60-70 2 70-80 2 80-90 3 90-100 9Tot a l 51 Draw a freque

Satish is 9 ranks ahead of Ajay in the class of 39 students. If Ajay’s rank is 15th from the last, then what is Satish’s rank from the start? सतीश 39 छात्रों की कक्षा में अजय से 9 रैंक आगे है। अगर अजय की रैंक आखरी से 15वीं है, तो सतीश की रैंक शुरू से क्या है?

The distance (in km) of 40 engineers from their residence to their place of work were found as follows: 5 3 10 20 25 11 13 7 12 31 19 10 12 17 18 11 32 17 16 2 7 9 7 8 3 5 12 15 18 3 12 14 2 9 6 15 15 7 6 12 Construct a grouped frequency distribution table with class size 5 for the data given above taking the first interval as 0-5 (5 not included). What main features do you observe from this tabular representation?

I started on my bicycle at 7 a.m. to reach a certain place . After going a certain distance, my bicycle went out of order. Consequently, I rested for 35 minutes and came back to my house walking all the way. I reached my home at 1 p.m. If my cycling speed is 10 kmph and my walking speed is 1 kmph then on my bicycle I covered a distance of 4(61)/(66)k m b. 13 4/9k m c. 14 3/8k m d. 1(10)/(21)k m