activity ask All students in your class to write a 3 digit number choose any student from the room at random what is the probability that the number written by Har him is divisible by 3
Answers
Answer:
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Answer:
Probability is the study of the chances of events happening.
Event:
A Possible outcome or combination of outcomes is called event.
The probability of happening our event always lies from 0 to 1.
The sum of all the probabilities of all possible outcomes of an experiment is 1.
Required probability=number of trials in which the event E has happened/Total number of trials
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Suppose there are 40 students In a class.
The probability of selecting any of the student= 40/40=1
A three digit number start from 100 to 999.
Total number of 3 digit numbers= 999- 99= 900
Now, Multiples of 3 in three digit numbers={102, 105 .....999}
Total numbers of multiples of 3 in three digit numbers= 900/3=300
The probability that the number written by her/ him is divisible by 3= 300/900= 3/9=1/3