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

a)(5+18+11+18+28+28+27+13+17+22)/10

=188/10=18.8

b)(188+11)/11

=199/11=18.0909091

Answer 2

Answer:

a- 18.7

b- 18.0= 18

Step-by-step explanation:

a- We can calculate mean by this formula-

Total number of observations/Number of observations

Total number of observations are-

5+18+11+18+28+28+27+13+17+22

No. of observations-

10

= 187/10

= 18.7

b- Total no. of observations-

5+18+11+18+28+28+27+13+17+22+11

No. of observation-

11

= Total number of observations/ Number of observations

= 198/11

= 18.0

= 18