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Q.

The median of first 8 prime numbers is


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a

7

b

9

c

11

d

13 

answer is B.

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Detailed Solution

The first eight prime numbers are 2,3,5,7,11,13,17,19.
We know that the median is the middle-most term of an observation when arranged in ascending order.
The fourth term is 7 and the fifth term is 11.
To calculate the median of the prime numbers, we will use the formula
Median= N 2 th term+ N 2 +1 th term 2  , where N= total number of observations.
Substituting values, we get,
Median= 8 2 th term+ 8 2 +1 th term 2 Median= 4 th term+ 5 th term 2 Median= 7+11 2 Median= 18 2 Median=9  
Therefore, the median is 9.
Thus, the correct option is 2.
 
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