Q25 of 145 Page 410

The median of first 8 prime numbers is

Listing out all first 8 prime numbers, we have


2, 3, 5, 7, 11, 13, 17, 19


Since, the median will be at the aggregate of the (8/2 =) 4th position and (8/2 + 1 = ) 5th position.


We have, (7 + 11)/2 = 18/2 = 9


Thus, median is 9.

More from this chapter

All 145 →
23

For a symmetrical frequency distribution, we have

 24

Look at the cumulative frequency distribution table given below:































Monthly income



Number of families



More than Rs. 10000



100



More than Rs. 14000



85



More than Rs. 18000



69



More than Rs.20000



50



More than Rs. 25000



37



More than Rs. 30000



15



Number of families having income range 20000 to 25000 is

 26

The mean of 20 numbers is zero. Of them, at the most, how many may be greater than zero?

 27

If the median of the data 4,7,x - 1,X - 3,l6,25, written in ascending order, is 13 then x is equal to