Question

A cricketer has a mean score of 45 in 8 innings. How many runs are to be scored in the 9 th inning to raise the mean score to 50

Answer 1

Answer:

the mean score to50

Step-by-step explanation:

A cricketer has a mean score of 45 in 8 innings .

45 = \frac{\text{Sum of all scors in 8 innings}}{8}45=

8

Sum of all scors in 8 innings

$$\begin{lgathered}45 \times 8 = \text{Sum of scores of 8 innings}\\360= \text{Sum of scores of 8 innings}\end{lgathered}$$

Let the score of 9 inning be x

So, Sum of scores of 9 innings = 360+x

We are supposed to find How many runs are to be scored in the 9th innings to raise the mean score to50

So, $$\begin{lgathered}50=\frac{360+x}{9}\\450=360+x\\450-360=x\\90=x\end{lgathered}$$

Hence 90 runs are to be scored in the 9th innings to raise the mean score to50

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A cricketer has a mean score of 45 in 8 innings . How many runs are to be scored in the 9th innings to raise the mean score to50