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10. Activity: Ask all the students in your class to write a 3-digit number in order. Choose any student from the 238 room at random. What is the probability that the number written by her I him is diuisible by 3? Remember that a number is d iuisible by 3, if the sum of its d igits is diuisible by 3. 10. Activity: Ask all the students in your class to write a 3-digit number in order. Choose any student from the 238 room at random. What is the probability that the number written by her I him is diuisible by 3? Remember that a number is d iuisible by 3, if the sum of its d igits is diuisible by 3.
We know that there is one number among three consecutive positive integers is divisible by 3. Hence, about one third of the students of the class would write the numbers divisible by 3. Hence, the required probability is .!:. . 3 Not.e: Here we are assuming number of students in class is a multiple of 3.
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