कार्य,ऊर्जा और शक्ति-L13 | NUMERICALS | Class 11 भौतिक विज्ञान | Ruchi Ma'am | 9AM |

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

A train leaves P at 9 am with speed of 30 km/h. Another train leaves Q at 11 am with speed of 45 km/h. The trains are travelling towards each other on parallel tracks. Distance between P and Q is 300 km. When they meet, what is the ratio of the distances covered by them? एक ट्रेन सुबह 9 बजे 30 km/h की गति से P से निकलती है। एक अन्य ट्रेन सुबह 11 बजे 45 km/h की गति से Q से निकलती है। ट्रेनें समानांतर पटरियों पर एक-दूसरे की ओर जा रही हैं। P और Q के बीच की दूरी 300 km है। वे कब मिलेंगीं, एवं उनके द्वारा तय की गई दूरियों का अनुपात कितना होगा?

Median of a distribution is the value of the variable which divides it into equal parts . In case of individual observations x_1,x_2 .. x_n , if the number of observations is odd, then median is the value of ((n+1)/2) th observation when the observations have been arranged in ascending or descending order of magnitude. In case of even number of observations median is the A.M. of the values of (n/2) th and (n/2+1) th observations, arranged in ascending or descending order of magnitude . The mode of distribution is that value of the variable for which the frequency is maximum . Median of the distribution 8,5,7,9,13,11,20,23 , 25 ,28 , 27 is