Question

(d) If Arithmetic mean of following data is 159.5. Then
find P.
X; 150 160 158 155 168 164
fi 10 | P | 8 15 7 16​
please justify how to find 'h' here.pleaseeee......

Answer 1

P  = 86

Step-by-step explanation:

X          fi                   X*fi

150       10                 1500

160       P                  160P

158       8                  1264

155       15                 2325

168       7                   1176

164       16                  2624

Total    56 + P           8889 + 160P

Mean = (8889 + 160P)/(56 + P)

(8889 + 160P)/(56 + P) = 159.5

=> 8889 + 160P = 8932 + 159.P

=> 0.5P  = 43

=> P  = 86

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