Question

The ratio of marks scored by Kamal in physics, chemistry and mathematics is 3 : 3 : 4. If the average of physics, chemistry and mathematics is 80. Find the marks scored by Kamal in each subject.
[3 MARKS]

Answer 1

Concept: 1 Mark
Application: 2 Marks

Let the marks scored by Kamal in physics $=3x$

Let the marks scored by Kamal in chemistry $=3x$

Let the marks scored by Kamal in mathematics $=4x$

Average of these subjects
$=\frac{(3x+3x+4x)}{3}=80$

$10x=240$

$x=24$

The marks scored by Kamal in physics $=3\times 24=72$

The marks scored by Kamal in chemistry $=3\times 24=72$

The marks scored by Kamal in mathematics $=4\times 24=96$