Question

find out the probability of picking a number which is a prime number randomly picked from 20 to30 (including) natural numbers

Answer 1

The probability of  randomly picked prime number is $\bold{\frac{2}{11}}$

Solution:

To find out the possibility of picking prime number from 20 to 30 is as follows,

Total sample space is the total numbers from 20 to 30 = 11  

Total number of prime numbers in 20 to 30 is 23 and 29 = 2  

Probability to get prime number between 20 to 30

           $= \bold{ \frac{\text { Prime number possibility from } 20 \text { to } 30}{\text { Total number from 20 to } 30}=\frac{2}{11}}$

Answer 2

The Probability of picking a prime number between 20 and 30 is $\frac{2}{11}$

Step-by-step explanation:

Given data

Total numbers from 20 to 30 n(S) = 11

To find the probability of picking prime numbers from 20 to 30

A number is said to be a prime number when it is divisible by 1 and the number itself.

Prime numbers between 20 and 30 is 23 and 29

Number of prime numbers between 20 to 30 n(A) = 2

Probability is defined as ratio between the number of possible events and total number of events

$P(A) = \frac{n(A)}{n(S)}$

$P(A) = \frac{2}{11}$

Therefore the probability of getting two prime numbers from 20 to 30 including natural numbers is $\frac{2}{11}$

To Learn More ...

1) Find the probability that a number selected at random from the numbers 1-25 is not prime number when each of the given number is equally likely to be selected

https://brainly.in/question/1025460

2) Cards numbered 1 to 30 are put in a bag . A card is drawn at random from this bag find the probability that the no. On drawn card is 1) a prime no. Greater then 7 2)not a perfect square no.

https://brainly.in/question/7101983