If the mean of 10, 12, 18, 13, P and 17 is 15, find the value of P ?
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Step-by-step explanation:
Given data is 10, 12, 18, 13, P and 17 and its mean is 15.
Number of observations = 6
∴ Mean = Sum of the observations / Number of observations
⇒ 15 = ( 10 + 12 + 18 + 13 + P + 17 ) / 6
⇒ 15 × 6 = 70 + P
⇒ 90 = 70 + P
⇒ P = 90 - 70
⇒ P = 20 is the answer.
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