Hi
Can someone please help with some tip on the following:
One thing that confuses me is when i see a question that requires counting the number of integers between two given integers, for example in the problem below:
"Certain cards are numbered from 101 to 350. What is the probability of getting a card with hundreds digit equal to 2"
In the above problem first part is to count the total number of numbers between 101 and 350 (both inclusive) and the second part requires counting all the numbers between 200 and 299.
Though it seems trivial but i get confused in such calculation and end up wasting a lot of time. Can someone suggest a technique or formula to do such inclusive or exclusive counting between integers quickly or without confusion?
Any help will be great.
Thanks.
Can someone please help with some tip on the following:
One thing that confuses me is when i see a question that requires counting the number of integers between two given integers, for example in the problem below:
"Certain cards are numbered from 101 to 350. What is the probability of getting a card with hundreds digit equal to 2"
In the above problem first part is to count the total number of numbers between 101 and 350 (both inclusive) and the second part requires counting all the numbers between 200 and 299.
Though it seems trivial but i get confused in such calculation and end up wasting a lot of time. Can someone suggest a technique or formula to do such inclusive or exclusive counting between integers quickly or without confusion?
Any help will be great.
Thanks.
