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Understanding: Chance and Probability Video Lecture | Mathematics (Maths) Class 7 (Old NCERT)
FAQs on Understanding: Chance and Probability Video Lecture - Mathematics (Maths) Class 7 (Old NCERT)
| 1. What is the difference between chance and probability? |  |
Ans. Chance and probability are closely related concepts, but they have distinct meanings. Chance refers to the likelihood of a specific outcome occurring, while probability is a numerical measure of the likelihood of an event happening. In simpler terms, chance is a more qualitative concept, while probability is a more quantitative concept.
| 2. How is probability calculated? | |
Ans. Probability can be calculated by dividing the number of favorable outcomes by the total number of possible outcomes. For example, if you want to find the probability of rolling a six on a fair six-sided die, there is only one favorable outcome (rolling a six) out of six possible outcomes (rolling a one, two, three, four, five, or six). Therefore, the probability would be 1/6.
| 3. Can probability be greater than 1? | |
Ans. No, probability cannot be greater than 1. Probability is always a value between 0 and 1, where 0 represents impossibility and 1 represents certainty. If the probability of an event is 1, it means the event is certain to occur. If the probability is 0, it means the event will not happen.
| 4. What is the difference between theoretical probability and experimental probability? | |
Ans. Theoretical probability is based on mathematical calculations and assumes that all outcomes are equally likely. It is determined by analyzing the underlying structure of the problem. On the other hand, experimental probability is based on actual observations or experiments. It is determined by conducting trials and recording the observed outcomes. Experimental probability may differ from theoretical probability due to factors such as sample size or random variations.
| 5. How can probability be used in everyday life? | |
Ans. Probability is used in various aspects of everyday life. For example, it is used in weather forecasting to predict the likelihood of rain or sunshine. It is used in insurance to assess the risk of certain events occurring and determine appropriate premiums. In sports, probability is used to calculate odds and predict the outcome of matches. Additionally, probability concepts are applied in decision-making, such as evaluating the chances of success or failure in different scenarios.
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