A class of 25 students took a science test 10 students had an average arithmetic mean score of 80 The

(10*80+60*15)/25=68
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10*80=800
15*60=900
800+900=1700
1700/25=68
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80 × 10 + 60 × 15 = 800 + 900 = 1700

1700/25=68
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((10*80)+(15*60))/5 =68
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sum1/10 = 80
sum1 = 800
sum2/15 = 60
sum2 = 900
(sum1+sum2)/25 = 1700/25 = 68
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900+800/25=68
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10 students had an average of 80.
total=10*80=800
other 15 students had an average score of 60.
total=15*60=900
the average score of the whole class=(800+900)/25
=68
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68
1700/25
68
9 years agoHelpfull: Yes(0) No(0)
10 student got average of 80 marks that means total marks scored by 10 student=80*10=800.rest 15 student got 60 marks as a average i.e total marks of 60 student =900. now average=800+900/25=68 ans
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1+2-------+10/10=80
=800
so remaining students are 15 so average of them is 900
s0 900+800=1700/25=68
9 years agoHelpfull: Yes(0) No(0)
(10*80+60*15)/25=68
9 years agoHelpfull: Yes(0) No(0)
(10*80+60*15)/25=68
9 years agoHelpfull: Yes(0) No(0)
Total 25 students so seperate it as 10 and 15
10 std = 80 = 10*80 = 800
15 std = 60 = 15*60 = 900
Total = 800+900=1700
Total students = 25
so 1700/25 = 68
the average score of of the class = 68
8 years agoHelpfull: Yes(0) No(0)
((80*10)+(60*15))/25=68
8 years agoHelpfull: Yes(0) No(0)
10*80+15*60/25
=68
8 years agoHelpfull: Yes(0) No(0)

A class of 25 students took a science test. 10 students had an average (arithmetic mean) score of 80. The other students had an average score of 60. What is the average score of the whole class?