Question

Find how many numbers between 2500 and 5000 can be formed using digits from
1. 2. 3. 4. 5 and 7, with no digit being repeated. ​

Answer 1

Answer:

kitchen,hcyfjycy it vyivkyvykvk by viyvky

Answer 2

Step-by-step explanation:

Between 2500 and 5000, using only 1,2,3,4,5 and 7 with no repetition.

You can form only 4-digit numbers. First digit can’t be 1,5 or 7 .

First digit can be 2,3 or 4 .

If the first digit is 2 , then you have 5 and 7 , as options. Then you have four remaining numbers and then three. So you get total of:

1×2×4×3=24

If the first digit is 3 , then you have five remaining, then four and at the end three.

1×5×4×3=60

If the first digit is 4 , then you have five remaining, then four and then three.

1×5×4×3=60

Now you just add the results and you get:

24+60+60=144

There are totally 144 different combinations. I hope this answered your question. Have a great day!