मराठी

If the Mean of the Following Data is 15, Find P. - Mathematics

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प्रश्न

If the mean of the following data is 15, find p.

x 5 10 15 20 25
f 6 P 6 10 5
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उत्तर

x f fx
5 6 30
10 P 10P
15 6 90
20 10 200
25 5 125
  N = P + 27 `sum` fx = 10P + 445

Given

⇒ Mean = 15

`rArr(sumfx)/N=15`

`rArr(10P+445)/(P+27)`

⇒ 10P + 445 = 15(P + 27)

⇒ 10P + 445 = 15P + 405

⇒ 15P - 10P = 445 - 405

⇒ 5P = 40

`rArrp=40/5`

⇒ P = 8

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पाठ 15: Statistics - Exercise 15.1 [पृष्ठ ५]

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आरडी शर्मा Mathematics [English] Class 10
पाठ 15 Statistics
Exercise 15.1 | Q 4 | पृष्ठ ५
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