How many whole numbers between 100 and 500 have 9 as one or more of its digits?

And your answer is?

The answer choices are

(A) 68
(B) 76
(C) 80
(D) 95
(E) 100
Is it e?

109, 119, 129, 139, 149, 159, 169, 179, 189, 190, 191, 192, 193, 194, 195, 196, 197, 198, 199

19 * 4 = ?

To find the number of whole numbers between 100 and 500 that have 9 as one or more of their digits, we can break down the problem into three separate cases:

Case 1: Numbers with 9 as the units digit
In the ones place, there are 10 possible digits (0 to 9). Out of these, 1 digit is 9. So there is 1 number with 9 as the units digit.

Case 2: Numbers with 9 as the tens digit
In the tens place, there are also 10 possible digits. However, for the numbers between 100 and 500, we need to exclude 0 and 9. So there are 8 possible digits (1 to 8). Therefore, there are 8 numbers with 9 as the tens digit.

Case 3: Numbers with 9 as the hundreds digit
In the hundreds place, there are only 4 possible digits (1 to 4) since the numbers are between 100 and 500. Out of these, 1 digit is 9. So there is 1 number with 9 as the hundreds digit.

To find the total number of whole numbers that satisfy any of the above cases, we simply need to add the values from each case: 1 (units digit) + 8 (tens digit) + 1 (hundreds digit) = 10.

Therefore, there are 10 whole numbers between 100 and 500 that have 9 as one or more of their digits.