Probability of An Event
Probability of An Event
Definition of Probability:
Probability is considered as a branch of mathematics that deals with uncertainty. It has been developed out of practical considerations and is used in taking decisions in almost every field. For example, while going out of house on cloudy day we have to take decision whether we should carry an umbrella or not. Such type of decision is taken by taking into consideration the probability of the occurrence of the event.
Let n be the total number of trials and m be the total number of trials in which the event has happened. The empirical probability P(E) of an event to occur is defined as:
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21 boys and 23 girls participate in a painting competition. The probability that a girl wins the competition is | |||
| Right Option : D | |||
| View Explanation | |||
A bag contains 5 red balls and n green balls. If the probability of drawing a green ball is three times that of red ball then value of n is : | |||
| Right Option : B | |||
| View Explanation | |||
In a box, there are 7 blue pens and 4 red pens. Ankit picks up a pen without looking at it. The probability that it is a red pen is | |||
| Right Option : A | |||
| View Explanation | |||
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