How many times 9 occur in 2 digit number
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Step-by-step explanation:
Based on this, we can deduce that out of 90 total two digit numbers (10–99), 1 is in 10 of them in the first spot (1/9 x 90) and 9 in the second (1/10 x 90). 1 therefore occurs 19 times in numbers 10–99, but only in 18 numbers, as it comes up twice in one number, 11
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Step-by-step explanation:
it occurs 11 times and first from 1 digit it is as follow. :; 9,19,29,38,49,59,69,79,89,99
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