Question

Find the mean and the median of the following arithmetic sequences:

i. 1, 3, 5, 7, 9,.........,199
ii. 7, 10, 13, 16,....., 607

Answer 1

Mean = 37.3

Answer 2

130.6 (for the second)

Answer 3

The ellipses represents numbers in between. I wasn't sure how to make an equation for this. There has to be a more efficient way to add up the number between 7 and 607, but I'm not sure how to do that.

Answer 4

Pattern for the second one is 3.

Answer 5

Keep adding 3 =P

Answer 6

Till you reach 607 Good Luck!!!

Answer 7

1,3,5,7,9,....,199
they are in A,P.
a=1
common difference d=3-1=2
let n be the number of terms.
tn=a+(n-1)d
199=1+(n-1)*2=1+2n-2=2 n-1
2 n=199+1=200
n=200/2=100
mean

Answer 8

I got 307 for the median for the second problem. Can anyone confirm if this is correct? Also, is the mean 307 as well?

Answer 9

corect