The average age of three boys is 15 years. If their ages are in ratio 3 : 5 : 7, the age of the youngest boy is 21 years 18 years 15 years 9 years 12 years Check Answer

Ajit has a certain average for 9 innings. In the tenth innings, he scores 100 runs thereby increasing his average by 8 runs. His new average is: A. 20 B. 21 C. 28 D. 32 Check Answer

The average temperature for Wednesday, Thursday and Friday was 40°C. The average for Thursday, Friday, and Saturday was 41° C. If the temperature on Saturday was 42° C, what was the temperature on Wednesday? A. 39° C B. 44° C C. 38° C D. 41° C Check Answer

The speed of the train going from Nagpur to Allahabad is 100 km/h while when coming back from Allahabad to Nagpur, its speed is 150 km/h. find the average speed during whole journey. 125 km/hr 75 km/hr 135 km/hr 120 km/hr