Question

The following are the last 10 run scores Colin got in cricket:
5, 18, 11, 18, 28, 28, 27, 13, 17, 22
a) Work out Colin's mean score.
b) Colin plays cricket again on Sunday. He gets 11 runs.
What is his new mean score?
Give your answers as decimals.

Answer 1

Answer:

a)18.8

b)20

Step-by-step explanation:

i hope this helps

Answer 2

Colin's mean score is 18.7 and Colin's new mean score is 18.

Given:

10 Scores of Colin in cricket.

5, 18, 11, 18, 28, 28, 27, 13, 17, 22.

To Find:

a) Colin's mean score

b) If Colin plays cricket again on Sunday. He gets 11 runs. What is his new mean score.

Solution:

The Mean is computed by calculating the sum of the given observations and then dividing it by the number of observations.

a) The sum of the 10 scores is

$5+18+11+18+28+28+27+13+17+22= 187$

Divide 187 by 10.

$\frac{187}{10}=18.7$

Colin's mean score is 18.7.

b) In this case one more score would be added to 187 which is 11.

$187+11=198$

There is a total of 11 observations. So divide 198 by 11.

$\frac{198}{11}=18$

Colin's new mean score is 18.

Thus, Colin's mean score is 18.7 and Colin's new mean score is 18.

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