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The arithmetic mean of set S is m, where S = {13, 15, 7, 9, 23, 17, 21}. Find the value of (m/3 + 4).


1. 9
2. 15
3. 10
4. 12

1 Answer

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Best answer
Correct Answer - Option 1 : 9

Given:

S = {13, 15, 7, 9, 23, 17, 21}

Formula Used:

Arithmetic Mean = Sum of terms/Number of terms

Calculations:

Sum of terms of S = 13 + 15 + 7 + 9 + 23 + 17 + 21

⇒ Sum of terms of S = 105

Number of terms = 7

⇒ Arithmetic Mean of S = m = 105/7

⇒ m = 15

According to question, we need t find the value of (m/3 + 4)

(m/3 + 4) = (15/3 + 4)

⇒ (m/3 + 4) = 5 + 4

⇒ (m/3 + 4) = 9

 The value of (m/3 + 4) is 9.

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