Practice question
Question
A bag contains 7 green and 8 white balls. If two balls are drawn simultaneously, the probability that both are of the same colour is:
Explanation
Total ways to choose two from fifteen equals C15,2 =105. Favorable both green C7,2=21 plus both white C8,2=28 totals 49. Therefore probability is 49 divided by 105 which simplifies to 7/15, illustrating combination probability without replacement.
Related blogs
Guides and insights connected to this topic
Earth as a System: Energy Matter and Life Notes - Geosphere, Hydrosphere, Atmosphere, Biosphere and Greenhouse Effect
Explore how the Sun, Earth's interior heat and chemical reactions drive energy and matter through the geosphere, hydrosphere, atmosphere and biosphere.
Food and Nutrition: Macronutrients and Micronutrients
IntroductionFood is any edible material or substance consumed to fulfill daily nutritional requirements. It contains essential nutrients (su...
Preparation of Mycological Growth Media
Glucose Yeast Extract Agar Principle The medium contains a variety of salts like sulphates, phosphates to support the growth of Lactobacilli...
Discussion
Comments
Please log in to join the discussion.
Login to commentNo comments yet. Be the first to start the discussion.