Question

if the median of the following distribution is 28.5 find the value of x and y

x & Y value i already find x =8 and y-7 i want same question but find mode with step by step by using step deviation method


who answer first get brilliant and 20 point

Answer 1

Answer:

Here, it is given that Median =28.5 and n=∑f  

i

​  

=60

Cummulative frequency table for the following data is given.

Here n=60⇒  

2

n

​  

=30

Since, median is 28.5, median class is 20−30

Hence, l=20,h=10,f=20,c.f.=5+x

Therefore, Median =l+(  

f

2

n

​  

−cf

​  

)h

28.5=20+(  

20

30−5−x

​  

)10

⇒28.5=20+  

2

25−x

​  

 

⇒8.5×2=25−x

⇒x=8

Also, 45+x+y=60

⇒y=60−45−x=15−8=7.

Hence, x=8,y=7