Question

The
average age in a city
of 10,000 is 40 years. The
average of halt of them is
so years. The average of
remainia ones is.
5​

Answer 1

Answer:

30

Step-by-step explanation:

Age of population in a city of 10,000 is 40 yr= 10,000 × 40 = 400,000

Age of half of them mean = 10,000 ÷ 2 = 5,000

Age of half of them is 50 years = 5,000 × 50 = 250,000

Remaining age = 400,000 – 250,000 = 150,000

The average of remaining ones is = 150,000 ÷ 5000 = 30

Answer 2

Answer:

Step-by-step explanation:

Sum of ages of 10000 ppl = 10000 × 40 = 400000

Half of 10000 ppl = 5000 ppl.

Sum of 5000 people = 5000 × 15 = 75000

So,

sum of remaining ones = 400000 - 75000 = 325000.