Question

If the mean of the following data is 20.2, then find P​

Answer 1

∴ 20.2 = 610 + 20p/30 + p

⇒ 20.2(30 + p) = 610 + 20p

⇒ 606 + 20.2p = 610 + 20p

⇒ 20.2p - 20p = 610 - 606

⇒ 0.2p = 4

⇒ p = 4/0.2 = 40/2 ⇒ p = 20

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Answer 2

Answer:

please check this attachment