hmm....
so for the first group (A), there are
V values that have a mean of 40. The second group (B) has
W values that have a mean of 64. So, Total(A) = V*40 and Total(B) = W*64. And (Total(A) + Totak(B))/(V + W) = 54
Code:
(system here)
{
Total(A) = V*40
Total(B) = W*64
(Total(A) + Totak(B))/(V + W) = 54
}
(40V + 64W)/(V + W) = 54
40V + 64W = 54*(V + W)
40V + 64W = 54V + 54W
40V + 10W = 54V
10W = 14V
V/W = 1.4