30. Calcula la moda o valor modal de los siguientes números: 8, 20, 15, 23, 15, 9, 7, 11, 24, 30, 15, 11, 5, 4, 19, 17, 15, 31, 9, 6, 12 a) 15 b) 23 c) 11 d) 19
[tex] < \geqslant < 2 = > < { \times - > < \times \frac{?}{?} }^{2} \times \frac{?}{?} \times \frac{?}{?} \times \frac{?}{?} \times \frac{?}{?} [/tex]
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