Question

3. Find the value of p if mean of following data is 20.6:
X 10 15 p 25 35
Y 3 10 25 7 5​

Answer 1

Step-by-step explanation:

Mean = ∑xifi

---------

∑fi

⇒mean =(10×3)+(15×10)+(p×25)+(25×7)+(35×5)+3+10+25+7+5

⇒mean = 3+10+25+7+5

30+150+25p+175+175

=20.6

⇒20.6 = 1030+25p

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50

⇒25p=500

⇒p=20