Question

x=10,11,12,13,14,f=3,12,18,12,3 find mean​

Answer 1

$mean = \frac{fx}{f} \\ mean \frac{(3 \times 10) + (12 \times 11) + (18 \times 12) + (12 \times 13) + (3 \times 14)}{3 + 12 + 18 + 12 + 3} \\ mean = \frac{30 + 132 + 216 + 156 + 42}{15 + 30 + 3} \\ mean = \frac{576}{48} \\ mean = 9$

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