Asked/Added Questions From NCERT:


Question 1. Asked on :13 January 2019:11:49:45 AM

 In a class test, the mean marks of boys and girls are respectively 42 and 45. If the mean marks of boys and girls are 44, Find the ratio of the number of boys to the number of girls.

-Added by Akki chauhan Mathematics » Statistics


Question 2. Asked on :11 January 2019:02:55:18 PM

 Find the median of first 10 prime numbers.


-Added by Prince Rawat Mathematics » STATISTICS

Answer:

Akki chauhan

 The first 10 prime numbers are : 2,3,5,7,11,13,17,19,23 and 29.

n=10

Median if n is even numbers

n2 th term = 5th term = 11

n2 + 1 = 5 + 1 = 6th term = 13

Median = 5th term + 6th term2 

Median = 11 + 132 

 = 242 = 12 Answer

-Answered by Akki chauhan On 15 January 2019:09:03:48 AM


Question 3. Asked on :11 January 2019:10:18:43 AM

 Define frequency of the observation.

-Added by Prince Rawat Mathematics » STATISTICS

Answer:

Rohit Rajput

 The number of times an observation occurs in the given data is called frequency of the observation.


-Answered by Rohit Rajput On 12 January 2019:08:59:05 AM


 

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