Definition of Probability


 
 
Concept Explanation
 

Definition of Probability

Probability: It predicts the chance of occuring an event.The value lies between 0 and 1. If an event is sure to happen then the probability will be 1 and if an event is impossible to happen then the the probabity of occurance is 0..

small Probability = frac{No ;of; favourable; Outcomes}{Total; number; of; events}

Example 1: We have balls number 10 to 18. What is the probability of picking an even numbered ball.

Sol: Total number of possible outcomes= 9 as there are 9 balls.

Total Number of favourable cases = 10,12,14,16,18 Numberd ball is picked. Therefore the number of favourable  cases is 5

dpi{120} small P(Even; Numbered; ball) = frac{5}{9}

Sample Questions
(More Questions for each concept available in Login)
Question : 1

21 boys and 23 girls participate in a painting competition. The probability that a girl wins the competition will be _____________.

Right Option : C
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Explanation
Question : 2

Probability in simple words is the _________________  of the happening of an event before it has already happened

Right Option : C
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Explanation
Question : 3

When the probability of an event is 1, then the event is known as __________________

Right Option : C
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Explanation
 
 
 
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