Find the probability that a number selected from the number 1 to 25 is not a prime number when each of the given numbers is equally likely to be selected.
GIVEN: A number is selected from numbers 1 to 25
TO FIND: Probability of getting a number which is not a prime.
Total number of cards is 25.
Total number of elementary events = 25
Cards bearing non prime numbers are 1,4,6,8,9,10,12,14,15,16,18,20,21,22,24, 25
Total number of cards bearing non-prime numbers = 16
Number of favourable elementary events = 16
We know that, Probability $=\frac{\text { number of favourable elementary events }}{\text { Total number of elementary events }}$
So, $P$ (getting a card bearing a non prime number) $=\frac{16}{25}$
Click here to get exam-ready with eSaral
For making your preparation journey smoother of JEE, NEET and Class 8 to 10, grab our app now.