The average age increased by 0.4 years. So, the difference of sum of ages of new student to the age of old student = 70*0.4 = 28 years (19+32+__x___) - (20+22+__y__) = 28 (x-y) + (51-42) = 28 x-y = 19 So, option I, II, and III all satisfy the above relation Hence, all three will be the answer.
Which company has launched an online social media and social networking service Threads?
Choose the correct statements regarding the process of photosynthesis.
Which gas is commonly used for the artificial ripening of fruits?
Which of the following is used as a substitute for mercury in thermometers?
What is the scientific name of rice?
Which set only includes biodegradable items?
What are the small, hair-like structures in the upper part of the respiratory tract called?
What laid the foundation for the Modern Education System in India?
Who was the third astronaut to travel to the Moon alongside Neil Armstrong and Buzz Aldrin?
What are the initial symptoms of Mpox?
