bonds maths question
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bonds maths question
Hi
Can anyone help answer this maths question from bond books. A cricketer's average score for 6 innings is 12 runs. What must he score in his next innings to make his average 13.
Answer is 19 but I just don't get it.
Please help!!!!!
Can anyone help answer this maths question from bond books. A cricketer's average score for 6 innings is 12 runs. What must he score in his next innings to make his average 13.
Answer is 19 but I just don't get it.
Please help!!!!!
Re: bonds maths question
If his average score over 7 runs was going to stay at 12 - he would need to score 12 (obviously)
To bump the average up to 13 he would have to score an 'extra' for every run completed ie. 7 - so he would have to score an extra 7 runs.
12 + 7 = 19
Hope this helps.
To bump the average up to 13 he would have to score an 'extra' for every run completed ie. 7 - so he would have to score an extra 7 runs.
12 + 7 = 19
Hope this helps.
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Re: bonds maths question
avg across 6 innings is 12
need to get avg across 7 of 13
to continue with same avg (12) he would need to score 12 in next innings.
to raise the avg for all 7 to be 13 he needs to score an additional run for each of the 7 innings so in total he needs to score 12 + 7 i.e. 19
need to get avg across 7 of 13
to continue with same avg (12) he would need to score 12 in next innings.
to raise the avg for all 7 to be 13 he needs to score an additional run for each of the 7 innings so in total he needs to score 12 + 7 i.e. 19
Re: bonds maths question
still not with ittoolate wrote:If his average score over 7 runs was going to stay at 12 - he would need to score 12 (obviously)
To bump the average up to 13 he would have to score an 'extra' for every run completed ie. 7 - so he would have to score an extra 7 runs.
12 + 7 = 19
Hope this helps.
Re: bonds maths question
thanks just worked it out. Fab forumslush wrote:still not with ittoolate wrote:If his average score over 7 runs was going to stay at 12 - he would need to score 12 (obviously)
To bump the average up to 13 he would have to score an 'extra' for every run completed ie. 7 - so he would have to score an extra 7 runs.
12 + 7 = 19
Hope this helps.
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- Location: Essex
Re: bonds maths question
For each of the previous 6 innings he has scored 12 runs. If his average for those had been thirteen runs he would have had to have scored an extra run each time - 6 in total. He needs to make up these 6 on his next innings as well as get the new average of 13 runs. 6+13=19
If it's still not clear, try drawing a table with innings going down the left hand side and two separate columns for old average and new average. Remember that the old average will go down 6 innings and that your new average must work across 7.
If it's still not clear, try drawing a table with innings going down the left hand side and two separate columns for old average and new average. Remember that the old average will go down 6 innings and that your new average must work across 7.
Re: bonds maths question
Total runs after 6 innings = 12 (average score after 6 innings) x 6 = 72
Total runs after 7 innings = 13 (average score after 7 innings) x 7 = 91
Hence run needed in the 7 inning to get an average of 13 runs) = 91-72 = 19
Total runs after 7 innings = 13 (average score after 7 innings) x 7 = 91
Hence run needed in the 7 inning to get an average of 13 runs) = 91-72 = 19
Re: bonds maths question
thanks i get it nowdez wrote:Total runs after 6 innings = 12 (average score after 6 innings) x 6 = 72
Total runs after 7 innings = 13 (average score after 7 innings) x 7 = 91
Hence run needed in the 7 inning to get an average of 13 runs) = 91-72 = 19