In Arun's opinion, his weight is greater than 65 kg but less than 72 kg. His brother does not agree with Arun and he thinks that Arun's weight is greater than 60 kg but less than 70 kg. His mother's view is that his weight cannot be greater than 68 kg. If all are them are correct in their estimation, what is the average of different probable weights of Arun?

Three years ago, the average age of a family of 5 members was 17 years. A baby having been born, the average age of the family is the same today . The present age of the baby is:

Average weight of 10 boys is more than the average weight of 15 girls by 5 kg. If the total weight of the 10 boys is 550 kg, what is the average of the 10 boys and 15 girls together?

The average of ages of three boys is 15 years. If their ages are in ratio 3:5:7. age of youngest boy is :

Find the average of first 9 consecutive odd numbers.

The average wages of a worker during a fortnight comprising 15 consecutive working days was Rs.90 per day. During the first 7 days, his average wages was Rs.87/day and the average wages during the last 7 days was Rs.92 /day. What was his wage on the 8th day?

The average age of a class is 15.8 years. The average age of the boys in the class is 16.4 yrs while that of the girls is 15.4 years. What is the ratio of boys to girls in the class?

Скільки зубців на зубчастому колесі, якщо діаметр ділильного кола 80 мм, модуль зубців 4 мм

Повна висота зубця в зубчастому колесі дорівнює 9 мм. Чому дорівнює модуль?

Яке з зубчастик колес має найменший діаметр ділильного кола