Question

Shrikant average marks in six subjects Shrikant average marks in 6 subjects in an examination were 65 is called 64 in English 68 in Hindi 58 in maths 55 in Science and 70 in history how many marks did I get in geography ​

Answer 1

Answer:

$\huge\red{75 }$

$\huge\mathfrak\pink{Solution..}$

Let the number of geography be 'X'

As per the question,the average number in 6 subjects is:- 65.

Given:-

Marks in English=64

Marks in Hindi=68

Marks in Maths=58

Marks in Science=55

Marks in History=70

So, Marks in Geography=?

As per the question,

$\frac{64+68+58+55+70+X}{6}=65$

$\implies\frac{315+X}{6}=65$

$\implies\:315+X =6\times 65$

$\implies\:315+X =390$

$\implies\: X =390-315$

$\implies\:X =75$

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Answer 2

Answer:

75

Let the number of geography be 'X'

As per the question,the average number in 6 subjects is:- 65.

Given:-

Marks in English=64

Marks in Hindi=68

Marks in Maths=58

Marks in Science=55

Marks in History=70

So, Marks in Geography=?

As per the question,

\frac{64+68+58+55+70+X}{6}=65

6

64+68+58+55+70+X

=65

{315+X}{6}=65⟹

6

315+X

=65

\implies\:315+X =6\times 65⟹315+X=6×65

\implies\:315+X =390⟹315+X=390

\implies\: X =390-315⟹X=390−315

\implies\:X =75⟹X=75