IN HOW MANY WAYS CAN A NUMBER BE FORMED BETWEEN 100 TO 1000 SUCH THAT EACH DIGIT IS CONSISTING OF 2 OR 9?

Asked by Deepshikha deepsi | 27th Feb, 2013, 03:03: PM

Expert Answer:

Since, each digit need to be consisting of either 2 or 9, so there are 2 possibilites for each of the digits. The number needs to be a 3 digit number (between 100 and 1000). So, there are total of 2*2*2 = 8 numbers which can be formed between 100 and 1000 such that each digit will be consisting of 2 or 9. 

Answered by  | 28th Feb, 2013, 05:55: AM

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