Question

the average age of 25 person is 30 years the average age increase by 1 year if ages of 5 others person are also included the average age of these 5 person​

Answer 1

Answer:

Average age of 25 person's is 30 years

30=x/25

Average age increases by 1 year if ages of 5 other person's are included.

30+1 = y/25+5

31 =y/30

30=x/25

x=25×30

x=750

31=y/30

y=31×30

y=930

Average age of these 5 person's is y-x /5

y-x =930-750/5

=180/5

= 36

average age of these 5 person's is 36 years