Math, asked by aryan289, 1 year ago

how many numbers are there between 100and1000 in which all the digits are distinct

Answers

Answered by sapna29

900 numbers are there between 100 and 1000

aryan289: but ans is 648 this que is of permutation ch of class 11

sapna29: sorry,1st place can be filled by 9 digits- 1–9 excluding zero as 0 on first place would not form a 3 digit no.

2nd place can be filled by 9 digits- 0–9 not including the 1st no.

3rd place can be filled by 8 digits- 0–9 not including he 1st 2 nos.

Therefore answer is 9*9*8= 648

Answered by sijykt

Answer:there are 648 numbers

Step-by-step explanation:

Previous Question

Next Question

Similar questions

English, 7 months ago

You are Romika, the Head Girl of D P S Siliguri. Your school is organising a social camp in the second week of June. You are supposed to impart education to adults. Write a notice to be put up on the school notice board inviting student’s volunteers. Give all necessary details and put the notice in a box.(Word limit :40-50 words) ...

History, 7 months ago

Sohgaura copper-plate was found in the state of _______ Madhya Pradesh Uttar Pradesh Rajasthan Assam ...

English, 7 months ago

EXERCISE 3.5 Put in “a”, “an", or "the" where necessary. If no word is necessary, put a X mark. 1. A: Where did you have ..... lunch? B: We went to .... restaurant. 2. A: Did you have ..... nice holiday? B: Yes, it was ............... best holiday I've ever had. 3. A: Where's ... nearest shop? B: There's one at ....................... end of this street.