The average of the ages of a group of 65 men is 32 years. If 5 men join the group, the average of the ages of 70 men is 34 years. Then the average of the ages of those 5 men joined later (in year) is :
Answer & explanation
Correct answer: option 4
Sum of age of newly added 5 men = 70 × 34 - 65 × 32
= 2380 - 2080
= 300
Average age of newly added 5 men = \(\frac{300}{5}\)
= 60