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  • In an examination a batch of 60 students made an average score of 55 marks and another batch of 40 students made 45. what is the overall average score?

In an examination a batch of 60 students made an average score of 55 marks and another batch of 40 students made 45. what is the overall average score?

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average;of;score;obtained;by;60;students=55\*Rightarrow 55=fracx_1+x_2+........+x_6060\* average;of;score;obtained;by;40;students=45\*Rightarrow 45=fracy_1+y_2+........+y_4040\* x_1+x_2+........+x_60=55 imes 60\* y_1+y_2+........+y_40=45 imes 40\* overall;average;of;all;students=fracx_1+x_2+........+x_60+y_1+y_2+........+y_40100\* overall;average;of;all;students=frac(40 imes 45)+(55 imes 60)100\*overall;average;of;all;students=frac1800+3300100=51\* Hence,;the;overall;average;score;of;100;students;is;51.

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Deependra Verma

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