14) The ages of A, B and C are 8 years 10 months.
15 years 6 months, 12 years 5 months respectively. What
is the average age of A, B and C?
A) 10 years 2 months
B) 12 years 3 months
or 13 years 6 months
D) 13 years 9 months
Answers
Answer:
Option B
12 years 3 months
Step-by-step explanation:
Given:-
The ages of A, B and C are 8 years 10 months.
15 years 6 months, 12 years 5 months respectively.
To find:-
What is the average age of A, B and C?
Solution:-
Age of A = 8 years 10 months
Age of B = 15 years 6 months
Age of C = 12 years 5 months
Sum of their ages =8 years 10 months + 15 years 6 months + 12 years 5 months
=>(8+15+12) years + (10+6+5) months
=>35 years + 21 months
we know that 1 year = 12 months
=>35 years + 12 months +9 months
=>36 years 9 months
Number of persons = 3
We know that
Average = Sum of all observations/Number of all observations
Average = 36 years 9 months /3
=>Average = [(36×12 months )+9 months] /3
=>Average = (432+9 months)/3
=>Average = 441 months/3
=>Average = 147 months
=>Average = 147/12 years
=>Average = 12 years 3 months
Answer:-
The average age of A,Band C = 12 years 3 months
Used formula:-
- Average = Sum of all observations/Number of all observations
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