###
**The average of 6 observations is 45.5. If one new observation is added to the previous observations, then the new average becomes 47. The new observation is :**

A. 58
B. 56
C. 50
D. 46
**Answer: Option B**

## Show Answer

Solution(By Apex Team)

$\begin{array}{l}\text{Let the new observation be = x}\\
\text{According to the question,}\\
\text{6 × 45.5 + x = 7 × 47}\\
\text{273.0 + x = 329}\\
\text{x = 329 – 273}\\
\text{x = 56}\end{array}$

## Related Questions On Average

### Ajit has a certain average for 9 innings. In the tenth innings, he scores 100 runs thereby increasing his average19 people went to a hotel for combine dinner party 13 by 8 runs. His new average is:

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C. 28

D. 32

### Find the average of all the numbers between 6 and 34 which are divisible by 5.

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### If the arithmetic mean of 0, 5, 4, 3 is a, that of -1, 0, 1, 5, 4, 3 is b and that of 5, 4, 3 is c, then the relation between a, b, and c is.

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C. 4a = 5b = c

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