हिंदी

Find the mean of 12, 17, 31, 25, 15. Find the resulting mean if observation is increased by 2. - Mathematics

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प्रश्न

Find the mean of 12, 17, 31, 25, 15. Find the resulting mean if observation is increased by 2.

योग
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उत्तर

Given: Data: 12, 17, 31, 25, 15 (n = 5).

Sum = 12 + 17 + 31 + 25 + 15

= 100

Mean = `100/5`

= 20

If observation is increased by 2:

New sum

= 100 + 5 × 2

= 110 

⇒ New mean

= `110/5`

= 22

Or

Use property:

20 + 2

= 22

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अध्याय 15: Statistics - Exercise 15C [पृष्ठ ३०३]

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नूतन Mathematics [English] Class 9 ICSE
अध्याय 15 Statistics
Exercise 15C | Q 5. (i) | पृष्ठ ३०३
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