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Answer :
86%
70X30=2100
20X62=1240
2100-1240 = 860
860/10=86
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Answer:
Mean mark for the girls is [tex]86%[/tex].
Step-by-step explanation:
Given information:
Number of total students in the class=[tex]30[/tex]
Number of boys in the class=[tex]20[/tex]
Then, number of girls will be=[tex]30-20[/tex]=[tex]10[/tex]
The mean mark of the class=[tex]70\times30=2100[/tex]
The mean mark for the boys is [tex]62[/tex]
Then, mark for the boys[tex]=62\times20=1240[/tex]
The mark for the girls=[tex]2100-1240=860[/tex]
Then mean mark of the girls will be [tex]\frac{860}{10}=86[/tex]
Hence, mean mark for the girls is [tex]86%[/tex].
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