Assume that n distinct values x_{1}, x_{2}, \......, x_{n} occur with frequencies f_{1}, f_{2}, \......, f_{n} respectively. If \overline{x}=7 and \\sum_{i=1} ^{8} f_{i} x_{i}=315, then \\sum_{i=1} ^{8} f_{i}=

KEAM 2021 Math Solved Paper

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Assume that n distinct values x1,x2,......,xn occur with frequencies f1,f2,......,fn respectively. If x=7 and

∑

i=1

fixi=315, then

∑

i=1

fi=

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