17. The mean age of the 5 people in a room is 30 years. One of the 5 people, whose age is 50 years, leaves the room. What is the mean age of the 4 people remaining in the room?

Answer and Explanation

Your Answer is

Correct Answer is C

Explanation

Assuming the average age of the remaining 4 people is x, (4x + 50) ÷ 5 = 30,

4x = 150-50,

x = 25