Question

find the mean of the following frequency distribution answer fast plz ​

Answer 1

Answer:

Step-by-step explanation: To find \Rightarrow Mean

Mean =\frac{\sum f\; x}{\sum f}

Now let's find \sum f\; x and \sum f

Class : 0-20 20-40 40-60 60-80 80-100

Frequency, f 17 28 32 24 19

x \frac{0+20}{2}=10 \frac{20+40}{2}=30 \frac{40+60}{2}=50 \frac{60+80}{2}=70 \frac{80+100}{2}=90

fx 17\times 10=170 28\times 30=840 32\times 50=1600 24\times 70=1680 19\times 9=1710

\sum f=17+28+32+24+19

\sum f=120

\sum f\; x= 170+840+1600+1680+1710

                 = 6000

Mean, \bar{x}=\frac{\sum f\; x}{\sum f}=\frac{6000}{120}=50

          \bar{x}=50

Answer 2

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