Math, asked by swetha0202, 1 year ago

guys I need ur help! pls answer it ASAP

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Answered by remavijayan0p13wvl
0
15+17+f+12+9+5+2/7

=f+60/7
f=-60/7
=-8.57

hope this helps
am not sure

swetha0202: why is it divided by 7?
Answered by siddhartharao77
1
Given median of the following data =  240.

C.I                            f                 Cumulative Frequency

0 - 100                    15                  15

100 - 200               17                   32(17 + 15)

200 - 300              f                      32 + f

300 - 400             12                     44 + f(32 + 12 + f)
 
400 - 500             9                      53 + f(44 + 9 + f)

500 - 600            5                       58 + f(53 + 5 + f)

600 - 700            2                       60 + f(58 + 2 + f)
---------------------------------------------------------------------------------------------

                      N = 60 + f.




Now,

L = 200, C.F = 32, Median class h = 200 - 300 = 100


Median = L +   \frac{ \frac{N}{2} - CF}{f} * h

240 = 200 +  \frac{ \frac{60 + f}{2} - 32}{f} * 100

240 - 200 =  \frac{60 + f - 64}{2f} * 100

40 =  \frac{f - 4}{2f} * 100

 \frac{40}{100} =  \frac{f-4}{2f}

40(2f) = 100(f - 4)

80f = 100f - 400

-20f = -400

f = 20.


Therefore f = 20.


Hope this helps!
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