ratio of marks obtained from a and b is 3 :4 if agents 30 marks less than B then the marks obtained by B is
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Answered by
25
let marks of a be x
marks of b be y
x/y = 3/4
=> 4x = 3y
but x has got 30 marks less than b
so y - 30 = x
so
4(y-30) = 3y
=> 4y - 120 = 3y
=> y = 120
so the marks obtained by b is 120
hope it helps mark as brainliest
marks of b be y
x/y = 3/4
=> 4x = 3y
but x has got 30 marks less than b
so y - 30 = x
so
4(y-30) = 3y
=> 4y - 120 = 3y
=> y = 120
so the marks obtained by b is 120
hope it helps mark as brainliest
karthik58137:
how a=b -30 will come
please clarify my dout
please make the problem easy
a has got 30 marks less than b
so marks of b - 30 = marks of a
read my answer now u will understand it
Answered by
0
The marks obtained by B is 40
Given:
The ratio of marks obtained from A and B = 3 :4
A gets 30 marks less than B
To find:
The marks obtained by B
Solution:
Given The ratio of marks of A and B = 3 :4
⇒ Let 3x and 4x be the marks of A and B respectively
[ Since they are in 3 : 4 ratio ]
Given A got 30 marks less than B
⇒ 3x = 4x - 10
⇒ 4x -3x = 10
⇒ x = 10
The marks obtained by B = 4(10) = 40
Therefore, the marks obtained by B is 40
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