the median of the following distribution is 11 find the value of p
observation 4 | 7 | 16 | 18 |
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frequency. 3 | 5 | 4 | P |
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Answer:
Answer
Mean=
4+8+p+12+6
2×4+3×8+5×p+10×12+13×6
=7
⇒8+24+5p+120+78=7(30+p)
⇒32+120+78+5p=210+7p
⇒120+110−210=7p−5p
⇒230−210=2p⇒20=2p⇒p=10
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