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September 20, 2014

September 20, 2014

Posted by **Annabella Richards** on Monday, June 20, 2011 at 2:09am.

- Maths -
**PsyDAG**, Monday, June 20, 2011 at 11:17amΣx/n = mean

for 19 students Σx = 19 * 14 = 266

(266 + x)/20 = 15

Solve for x.

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