The frequency distribution of discrete data is given below, the frequency x against value 0 is missing If the mean is 2.5, then the missing frequency x will be
Variable012345Frequencyx204040204
A
0
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B
1
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C
3
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D
4
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Solution
The correct option is D4 ∑fixi∑fi=2.5⇒0×x+1×20+2×40+3×40+4×20+5×4124+x=2.5 Hence, we get ⇒x=4