The probability of getting a multiple of 5 if two digit number is written down at random is
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Given : two digit number is written down at random is
To Find : The probability of getting a multiple of 5
Solution:
two digit numbers are from 10 to 99
There are 90 , 2 digit numbers
Multiple of 5 if ends with 0 or 5
10 , 20 , 30 , 40 , 50 , 60 , 70 , 80 , 90
15 , 25 , 35 , 45 , 55 , 65 , 75 , 85 , 95
18 numbers are Divisible by 5
Hence probability = 18/90 = 1/5
The probability of getting a multiple of 5 if two digit number is written down at random is 1/5
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