ask all the students in your class to write three digit number any student from your room at random what is the probability that the number is written by him or her is divisible by 3 remember that a number is divisible by 3 if the sum of its digits is divisible by 3 ?
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Answers
Answered by
6
Answer:
= 1/3
Step-by-step explanation:
This activity can be taken as a general problem:
Well, we know the divisibility by 3 is when the sum of all the digits is divisible by 3
So,
The student will write the number between 100-999
There are 900 3-digit numbers, which are 100, 101, 102, 103, ..., 999.
The first 3-digit numbers that are exactly divisible by 3 is 102, 105, ..... 999
total numbers which are divisible by 3 = 300
P(the sum of all the digits is divisible by 3) = 300/900
=1/3
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Answered by
1
Answer:
three digit numbers
300,301,333.324,330.999
total 3 digit no. =6
p( divisibility by three)= 5/6
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