If the mean of the following data is 26.7,then find the value of f.
xi 15 20 25 30 35 40
fi 4 8 18 f 7 32
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Answer:
xi=160
fi=62f
mean =. xfi/xi
26.7 = 160/62f
62f =160-26.7
62f =133.3
f = 133.3/62
f = 2.14
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