When randomly selecting an integer from 40 to 50 inclusive, what is the probability of selecting a prime integer? Express your answer as a common fraction.
Show the steps on how you do it!
Thank you
Show the steps on how you do it!
Thank you
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First you have to determine which of the integers between 40 and 50 inclusive is prime. 41, 43, 47 are prime. Now, how many numbers are there between 40 and 50? There are 11:
1. 40
2. 41
3. 42
4. 43
5. 44
6. 45
7. 46
8. 47
9. 48
10. 49
11. 50
You can also calculate (end of range+1)-start of range because the range is inclusive.
So, 3 primes, 11 possibilities, chances of selecting a prime are 3/11
1. 40
2. 41
3. 42
4. 43
5. 44
6. 45
7. 46
8. 47
9. 48
10. 49
11. 50
You can also calculate (end of range+1)-start of range because the range is inclusive.
So, 3 primes, 11 possibilities, chances of selecting a prime are 3/11