Question

An integer is choose at random between 1 and 100 find the probability that it is divisible by 8 not divisible 8

Answer 1

divisible by 8 = 11/100

not divisible by 8 = 89/100

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Answer 2

number of integers between 1 -100 =98

number of integers divisible by 8 = 12

Number of integers not divisible by 8 = 98-12=86

So probability of choosing an integer which not divisible by 8 is

86/98 = 43/49

Answer is 43/49

------- How I knew that there is 12 numbers____

just divide 98/ 8 = quotient is 12 .