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Nelson bowled 4 games and scored an average (arithmetic mean
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23 Apr 2020, 10:12
23 Apr 2020, 10:12
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60% (01:54) correct
39% (01:53) wrong based on 23 sessions
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Nelson bowled 4 games and scored an average (arithmetic mean) of 120 points. If his overall average for all 5 games is a multiple of 7, which of the following could be his score on the fifth game?
Indicate all such scores.
A. 80
B. 110
C. 155
D. 185
Indicate all such scores.
A. 80
B. 110
C. 155
D. 185
Re: Nelson bowled 4 games and scored an average (arithmetic mean
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20 May 2020, 08:53
20 May 2020, 08:53
In this case, I would advise you to figure out what is the Difference Between Math and Arithmetic | Differencebtwn.
Re: Nelson bowled 4 games and scored an average (arithmetic mean
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03 Jun 2020, 04:52
03 Jun 2020, 04:52
sum of scores of 4 games = 120*4 = 480
avg of 5 games is a multiple of 7, consider avg= 7*d
sum of scores of 5 games= 7*d*5 = 35*d
score on the 5th game = sum of scores of 5 games - sum of scores on 4 games = 35*d - 480
Now to plug in options,
A. 80
80 = 35*d - 480 ----eq 1
D. 185
185 = 35*d - 480 ----eq 2
both these equations give d as an integer.
Hence the options A,D are correct
avg of 5 games is a multiple of 7, consider avg= 7*d
sum of scores of 5 games= 7*d*5 = 35*d
score on the 5th game = sum of scores of 5 games - sum of scores on 4 games = 35*d - 480
Now to plug in options,
A. 80
80 = 35*d - 480 ----eq 1
D. 185
185 = 35*d - 480 ----eq 2
both these equations give d as an integer.
Hence the options A,D are correct
