If the average of 3, 8, 9 and x is 8. Then, what is the value of x ? Option 1: 10 Option 2: 12 Option 3: 14 Option 4: 8

Answer: 12. Solution: Average = (3 + 8 + 9 + x)/4 = 8. So 20 + x = 32, giving x = 12, which matches option 2.

Arithmetic

Central Tendency

Easy

If the average of 3, 8, 9 and x is 8. Then, what is the value of x ?

✅ Correct Option: 2

Average = $\frac{3 + 8 + 9 + x}{4} = 8$ . So $20 + x = 32$ , giving $x = 12$ , which matches option 2.

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Variable	11	12	13	14	15	16	17	18	Total
Frequency	5	7	11	9	8	7	3	5	55

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If the average of 3, 8, 9 and x is 8. Then, what is the value of x ?

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