a probability question

Question

say we are having a random drawing and given the following conditions:

the possibility of the drawn number greater than 50 is 20%

the possibility of the drawn number smaller than -50 is 15%

now what is the possibility of the drawn number that falls between -50 and 50?

Answer 1

Since the total probability has to add up to 100%, then you would just subtract the total probability of falling outside the -50 to 50 range (20% + 15% = 35%) from 100% to get 65% of falling inside the -50 to 50 range.