Test 3 review answers
... c. contain at least two 0's? 210 11 (Total number no 0's exactly one 0) 10. How many three-digit numbers are there in which the sum of the digits is even? 450—first note there are 900 three digit numbers. Let’s look at them in blocks of 10. For example, 100 – 109, 110 – 119, etc. Notice that n ...
... c. contain at least two 0's? 210 11 (Total number no 0's exactly one 0) 10. How many three-digit numbers are there in which the sum of the digits is even? 450—first note there are 900 three digit numbers. Let’s look at them in blocks of 10. For example, 100 – 109, 110 – 119, etc. Notice that n ...
