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allsm [11]
3 years ago
15

Can someone give me the answer

Mathematics
1 answer:
EleoNora [17]3 years ago
6 0

Answer:

4

Step-by-step explanation:

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For how many three digit numbers (100 to 999) is the sum of the digits even? (For example, 343 has an even sum of digits: 3 + 4
n200080 [17]

Answer:

there are 425 numbers of three digits whose the sum of the digits is even.

Step-by-step explanation:

Option 1:

It is necessary to accomplish one of the next conditions:

(1) all of the digits are even.

(2) exactly 2 of the digits are odd

Then, for the first condition:

4x5x5 = 100 -> this is because the first digit can not be 0.

for the second condition:

(3C1)*5*5*5-1*5*5 =3*125-25=350

where 3C1 is a combination.  The 3C1 determines which of the three digits is even, and it is necessary to subtract the numbers under 100 with the other 2 digits odd.

So, there are 450 numbers of three digits whose the sum of the digits is even.

Option 2:

there are 900 three digit number and 5*5*5 =125 has 3 odd numbers and 5*5*5+4*5*5+4*5*5=325 has 1 odd number, so there are 450 numbers of three digits whose the sum of the digitis is odd, so 900-450 whose the sum of the digits is even.

4 0
3 years ago
The total length of 8 bricks is 75cm longer than the total length of 5 bricks. Write an equation and solve it to find the length
krek1111 [17]

Answer:

8x = 75 + 5x

where x = length of one brick

25cm

Step-by-step explanation:

6 0
3 years ago
Find the mean of the integers<br> -16,-27,21,-19,14,-3
babunello [35]
To find the mean all you have to do is add all the numbers...
you should get -30
 and divide by a number of numbers, there are 6
 so -30/6 is -5
5 0
3 years ago
Find the median of the following numbers. 14, 17, 21, 28, 40. ​
Elis [28]

Answer:21

Step-by-step explanation: The median is the number in the middle sorted from least to greatest, here 21 is the middle number.

4 0
3 years ago
Read 2 more answers
Please hurry
Olenka [21]

Answer:

B.8K-168/K-12

4 0
3 years ago
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