if the arithmetic mean of following data is 159.5.then find P..its very easy solve fast!!
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Answer:
103.5 is ans of your question i think
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xi fi xifi
150 10 1500
160 P 160P
158 8 1264
155 15 2325
168 7 1176
164 16 2624
Total:- Total:-
56+P 8889+160P
Mean=(sigma xifi)/sigma fi
159.5=(8889+160P)/56+P
159.5(56+P)=8889+160P
8932+159.5P=8889+160P
159.5P-160P=8889-8932
-0.5P=-43
Multiplying 10 on both the sides
-5P=-430
P=(-430/-5)
P=86
150 10 1500
160 P 160P
158 8 1264
155 15 2325
168 7 1176
164 16 2624
Total:- Total:-
56+P 8889+160P
Mean=(sigma xifi)/sigma fi
159.5=(8889+160P)/56+P
159.5(56+P)=8889+160P
8932+159.5P=8889+160P
159.5P-160P=8889-8932
-0.5P=-43
Multiplying 10 on both the sides
-5P=-430
P=(-430/-5)
P=86
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