Find probability of 2 digit number not divisible by 7
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Answer:
77/90
Step-by-step explanation:
Total 2 digit numbers = 10 to 99 = 90 numbers
Number divisible by 7 = 14 , 21 .. ...91 , 98 ( 7*2 , 7*3 , ..... , 7 * 13 , 7*14) = 13 numbers
Not divisible by 7 = 90 - 13 = 77
Probability = 77/90
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