CBSE Class 10 Sample Paper for 2021 Boards - Maths Standard
You are here
CBSE Class 10 Sample Paper for 2021 Boards - Maths Standard
Last updated at August 8, 2026 by Teachoo
Note : This is similar to Example 8, Chapter 14 Class 10 Statistics (NCERT Book)
Check the answer here https:// www.teachoo.com /1963/561/Example-8---Median-is-525.-Find-values-of-x-and-y/category/Examples/
Transcript
Question 31 The median of the following data is 16. Find the missing frequencies a and b, if the total of the frequencies is 70.Given āāšš = 70 Finding Cummulative Freq. Since Median = 16 15 ā 20 is median class Median = l + (š/2 āšš)/š Ć h Where l = lower limit of median class h = class-interval n = āāšš cf = cumulative freq.of class before median class f = frequency of the median class Now, Median = l + (š/š āšš)/š Ć h 16 = 15 + (70/2 ā (24 + š))/15 Ć 5 16 ā 15 = (35 ā 24 ā š)/3 1 = (11 ā š)/3 3 = 11 ā a a = 11 ā 3 a = 8 Also, āāšš = 55 + a + b 70 = 55 + a + b Putting a = 8 70 = 55 + 8 + b 70 = 63 + b 70 ā 63 = b b = 7
