Numeracy skills: Statistics and Probabilities

A skill of Professional Knowledge in Teacher Professional License — General Pedagogy. Practise it with explained questions, and review your mistakes until you master it.

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Skill lessons

الإحصاء والاحتمال: المتوسط والمدى والاحتمال البسيط
حساب الوسط الحسابي والوسيط والمنوال والمدى، واحتمال سحب عنصر من مجموعة.
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Solved examples

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Example 1

متوسط درجات 5 متعلمين 16، وأضيفت درجة متعلم سادس فصار المتوسط 17. ما درجة المتعلم السادس؟

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Correct answer: C

مجموع الخمسة 5 × 16 = 80، ومجموع الستة 6 × 17 = 102، فدرجة السادس 102 − 80 = 22.

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