Statistics - if the mean of the above data is 18.04, find..

[Guest]

Please, help me out with this statistics question:

X: 10 15 20 25 30
F: 16 13 N 5 K

If the mean of the above data is 18.04; find N and K.

Thanks.

[Guest]

(16 + 13 + N + 5 + K)/5 = 18.04

[coolbabe]

(16 + 13 + N + 5 + K)/5 = 18.04

Thanks but I think we ought to multiply X and F (i.e FX) and divide through by summation of F, after this, how do I get the value for N and K.