Question

in a monthly unit test,the marks scored by ramesh and sunil are in the ratio 10:7 and bharat and sunil are in the ratio 8:9.if bharat scores 112 marks,then find the marks scored by ramesh​

Answer 1

Answer:

$\frac{a}{x} = 70 \\ \\ a = 70x \: \: \: \: \: \: and \\ \frac{b}{y} = 73 \\ b = 73y$

Now, mean marks of all the students is 7

$\frac{sum of the marks of all the students}{x + y} = 71$

⇒sum of the marks of all the students=a+b

⇒a+b=70x+73y

Hence the ratio is 2:1