The ages of a family of 7 members are 2, 5, 12, 18, 38, 40 and 60 years. After 5 years a new member, aged X years, is added. It is noted that the average age now increases only by 1.5 years. The value of X (in years) will be:
A. 1
B. 2
C. 3
D. 4
Answer:B
The ages of a family of 7 members are 2, 5, 12, 18, 38, 40 and 60 years. After 5 years a new member, aged X years, is added. It is noted that the average age now increases only by 1.5 years. The value of X (in years) will be:
A. 1 B. 2 C. 3 D. 4