Question

how many numbers are there between 100 and 1000 such that every digit is either 5 or 7​

Answer 1

Answer:

Just think in your mind that you have 3 boxes one for unit place one for tens place and one for hundred place. As we want the number between 100 and 1000 all are 3 digit no. except 1000 and we know it can be neglected.

so for unit place we have two choices either 2 or 9. same for tens place and hundred place. so the answer is 2×2×2=8.

Step-by-step explanation:

hope this helps you please mark as brainlest answer

Answer 2

Answer:

फर्स्ट क्लास शब्दों में कौन सा शब्द संख्यावाचक विशेषण है-

1 point

क्लास

फर्स्ट

फर्स्ट क्लास

कोई नहीें