पृथ्वी को Asteroid से बचाएगा यह अंतरिक्ष यान| information about universe | facts about space #shorts

Which among them is the form of learning in which a child learn to organize information and fact about anything in logical structure?

An opinion poll was conducted by interviewing 150 people. Calculate the mean age of the people on the basis of the following information about them. Use the short method.