किरण प्रकाशिकी एवं प्रकाशिक यंत्र | JEE |Class 12 भौतिक विज्ञान |1 PM Class By Ravikant Sir |L9 |

Class 12 Maths | Chapter 1 | संबंध एवं फलन | Important Questions | Quick Revision

Ratio of First ,Second and Third Class train fares between two stations was 8:6:3 .First Class and Second Class train fares are reduced by 1/6 and 1/12 repectively .Ratio of no of passengers in first, second and third class in a year is 4:9:24 .From a stattion total sale of ticket of Rs. 355600 .First the amount collected from first class .

Between two railway staions the fare of 1^(st), 2^(nd) and 3^(rd) class are in the ratio 8:6:3. But later on the fare of 1^(st) and 2^(nd) class is decreased by (1)/(6) and (1)/(12) spectively. In one year the no. of passengers of 1, 2nd and 3rd class are in the ratio for 4:9:24. If total tickets amounting Rs 355600 are sold then find the fare of all 3rd class.

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?