A number is randomly picked from following list 2, 3, 4, 5, 6, 7, 8, 9.... and so on till 29. What

M4maths Previous Puzzles

31 Jul 2017 Probability

A number is randomly picked from following list 2, 3, 4, 5, 6, 7, 8, 9.... and so on till 29.
What is the probability that its a prime number?

OPtion

1) 10/27
2) 10/29
3) 5/13
4) 9/28
5) 5/28
6) 5/14
7) 7/16
8) 9/29
9) 8/28
10) None of these

Solution

Count of total number betweeen 2 to 29 = 28

List of Prime numbers between 2 to 29 (both inclusive):
2, 3, 5, 7, 11, 13, 17, 19, 23, 29
Count of (2, 3, 5, 7, 11, 13, 17, 19, 23, 29) = 10

Probability of selecting prime number from numbers between 2 to 29 = 10/28 = 5/14

Correct Option: 6 Best Solution (13)

Bodla Anupriya   7 years AGO

the prime numbers between 2and 29 are 10
the total numbers are 28
required probability=10/28..I.e,5/14

Like? Yes (1) | No   

AMAN Sinha   7 years AGO

there are 10 prime no till 29
total no 28
probability = 10/28=5/14

Like? Yes | No   

Saloni Jain   7 years AGO

Favorable outcomes =10
Total outcomes =28
Probability =10/28=5/14

Like? Yes | No   

Maddi raju   7 years AGO

n(s)=28 and n(e)=10 then we get P(e)=n(e)÷n(s)

Like? Yes | No   

Anitha   7 years AGO

no of prime numbers = 10
total numbers = 28
prob = 10/28 = 5/14

Like? Yes | No   

vikas patidar   7 years AGO

prime no.s from 2 to 29 is 10 and total no.s are 28 so probability of getting prime no. is 10/28=5/14

Like? Yes | No   

AYAN PAUL   7 years AGO

In between 2& 29 there are 10 prime no so the probability of picking a prime no among these will be = (10/28) = 5/14

Like? Yes | No   

SAYAN CHATTERJEE   7 years AGO

the prime no. s from 2 to 29 are : 2,3,5,7,11,13,17,19,23,29.............total 10 no.s
Total no. are 28
So, probability of choosing a prime no. is 10/28= 5/14.
Option 6.

Like? Yes | No   

Bharat Juneja   7 years AGO

there are total 10 prime numbers.
i.e. 10/28 =5/14

Like? Yes | No   

VARUN   7 years AGO

Total numbers in given domain=28
Prime numbers in given domain=2,3,5,7,11,13,17,19,23,29
So,total number of prime numbers=10
Probability that its a prime number=(10C1/28C1)=(10/28)=(5/14)
Hence option 6

Like? Yes | No   

SAURAV CHAURASIA   7 years AGO

The prime numbers are: 2,3,5,7,11,13,17,19,23,29.
therefore,
n(E): 10
n(S): 28
Probability= 10/28 = 5/14.

Like? Yes | No   

venkata anusha   7 years AGO

total no of prime nos btw 2 to 29 is 10. so 10/28=5/14

Like? Yes | No   

NABA KISHORE PADHY   7 years AGO

out of 28 numbers (2-29), 10 prime numbers are there. 2,3,5,7,11,13,17,19,23 & 29
Required probability is =10/28=5/14

Like? Yes | No