Mean age of basketball players in a team....Please help?

Question

1.The mean age of ten members of a basketball team is 24.3 years. Players aged 31 and 28 are replaced by players aged 18 and 19. Find the new mean age for the team

2.The mean value and median of seven different positive integers is 13. What is the greatest possible value.

3. Find the mean height of all students of a school if

Boys were 123 and their mean height is 178.4
Girls were 237 and their mean height is 168.3

Even if you answer half a question you'll do a big favor to me
Thank you

Answer 1

Since the mean is 10, what does that mean the total is? 24.3*10 = 243.
Now, how much has the total gone down by? (31-18) and (28-19) make 22. So the new total is 223. So the new mean is 22.3.

Lets list the numbers in order:
a b c 13 d e f.
We want to make the last one as big as possible, so lets make the others as small as possible:
1 2 3 13 14 15 f
Now we just have to find f which makes the total 13*7; which gives 43.

Again, this just comes down to working out totals. Boy total = 123*178.4. Girl total is 237*168.3. Total total = 61830.3.
So we divide that by the total number of people (360) to get 171.75, approx.

Answer 2

1. You know how to compute a mean, right? If ten players have a mean age of 24.3, the computation is

24.3 = total of ages / 10

That means the total of their ages is 243.

Answer 3

theres no age limits on college basketball gamers..or the different college activities for that be counted. as long as you're at the instant enrolled comprehensive time at a university, and characteristic eligibility final, you could play. college of South Carolina had a soccer participant a pair years in the past named tim frisby who became 39 or forty.

Answer 4

well i knew dis homey name Tyrone, he was hella mean azz basketball player I think his age be 23, I'll go ask him fo ya.wurd.