One-way ANOVA is applied to independent samples taken from three normally distributed populations with equal variances.The following summary statistics were calculated:

n₁=9x₁=15s₁=2(NOTE:x_idesignates a sample mean of the ithsample. Also Recall the formula for the sample variance

n₂=11x₂=18s₂= 3s²= (x_i- x)²/(n-1), in order to obtain a sum of squared deviations)

n₃=9x₃=20s₃= 2

The within-treatments variation equals:

a.460.

b.60.

c.137.

d.154.