Question

Find x and y if median 28.5 total observant 60.

Find x and y if median 28.5 total observant 60.

C.I 0 – 10 10 – 20 20 – 30 30 – 40 40 – 50 50 – 60

F 5 X 20 15 Y 5​

Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

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