حلول الأسئلة
السؤال
إذا اختيرت نقطة عشوائياً على الشبكة المجاورة، فأوجد كلاً مما يأتي:
(النقطة داخل شبه المنحرف أو المربع أو الدائرة) P
الحل
شاهد حلول جميع الاسئلة
حل أسئلة تدرب وحل المسائل
إذا اختيرت النقطة X عشوائياً على
في الشكل المجاور، فأوجد كلاً مما يأتي:
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9) طيور: تقف أربعة طيور عند نقاط على سلك كما في الشكل المجاور، فإذا هبط طائر خامس عشوائياً على نقطة من نقاط السلك فما احتمال أن يقف بين الطائر رقم 3 والطائر رقم 4؟
10) تلفاز: يتابع عمار برنامجاً تلفزيونياً مدته 30 دقيقة، إذا كان يبث إعلان في التلفاز في وقت عشوائي مرة كل فترة 3 ساعات، فما احتمال أن يشاهد عمار الإعلان ثانيةً خلال متابعته برنامجه المفضل الذي مدته 30 دقيقة في اليوم التالي؟
أو 0.17 تقريباً أو 17%.
إذا اختيرت نقطة عشوائياً في كل من الأشكال الآتية، أوجد احتمال وقوعها في المنطقة المظللة.
11)
12)
13)
استعمل القرص ذا المؤشر الدوار لإيجاد كل مما يأتي (إذا استقر المؤشر على الخط الفاصل بين القطاعات الملونة يعاد تدويره):
14) (استقرار المؤشر على اللون الأصفر) P
15) (استقرار المؤشر على اللون الأزرق) P
16) (عدم استقرار المؤشر على اللون الأخضر) P
17) (عدم استقرار المؤشر على اللون الأحمر ولا على اللون الأصفر) P
صف حادثة يكون احتمالها
لكل من النماذج الآتية:
18)
اختيار نقطة واقعة بين 10 و20
19)
استقرار المؤشر على اللون الأخضر.
20) هندسة إحداثية: إذا اختيرت نقطة عشوائياً على الشبكة المجاورة، فأوجد كلاً مما يأتي:
a) (النقطة داخل الدائرة) P
أو 0.13% أو 13% تقريباً
b) (النقطة داخل شبه المنحرف) P
c) (النقطة داخل شبه المنحرف أو المربع أو الدائرة) P
21) جبر: اختيرت نقطة عشوائياً في الدائرة المجاورة، أثبت أن احتمال وقوعها في المنطقة المظللة يساوي
. (إرشاد مساحة القطاع الدائري = مساحة الدائرة ×
)
(وقوع النقطة X في المنطقة المظللة) P
مساحة سطج الدائرة مساحة سطح القطاع =
22) هندسة إحداثية: إذا اختيرت نقطة (x,y) عشوائياً في منطقة حل نظام المتباينات
فما احتمال أن يكون
؟
0.50 أو 50% تقريباً
23) زراعة: مزرعة مقسمة إلى حقول كما في الشكل المجاور:
a) ما المساحة الإجمالية لحقول الخيار والجزر؟
67.5 وحدة مربعة.
b) إذا وقف مزارع في مكان من المزرعة عشوائياً لجني المحصول، فما احتمال أن يكون قد وقف في حقل من حقول البقدونس.
0.31 أو 31%