Anita has 2 sisters and 3 brothers. The mean of all their ages is 6yrs.What will their mean age be 10yrs from now?20 yrs from now?
So, there is 5 siblings total. If you add up all there ages and divide by 5, you get 6. What can you divide by 5 to get 6?
When you get "that number", you can age the siblings however you want to get "that number" as your total. The, keep finding the mean by adding 10 and 20 years to all their ages.
720
To find the mean age of Anita and her siblings in the future, we need to first calculate their current mean age and then add the number of years we want to project into the future.
Given that Anita has 2 sisters and 3 brothers, the total number of siblings is 2 + 3 = 5.
To find the current mean age, we can use the given information that the mean of all their ages is 6 years:
Total age of Anita and her siblings = Mean age x Total number of siblings
= 6 years x 5 siblings
= 30 years
Now, let's calculate their mean age in the future.
10 years from now:
To determine their future mean age, we need to add 10 years to the current total age:
Future total age of Anita and her siblings = Current total age + Number of years in the future
= 30 years + 10 years
= 40 years
To get the future mean age, we divide the future total age by the total number of siblings:
Future mean age = Future total age / Total number of siblings
= 40 years / 5 siblings
= 8 years
Therefore, the mean age of Anita and her siblings 10 years from now will be 8 years.
Now, let's calculate their mean age 20 years from now:
Future total age of Anita and her siblings = Current total age + Number of years in the future
= 30 years + 20 years
= 50 years
Future mean age = Future total age / Total number of siblings
= 50 years / 5 siblings
= 10 years
Therefore, the mean age of Anita and her siblings 20 years from now will be 10 years.