Question

The marks of three students a, b and c of a class are in the ratio 17:14:18 the marks of students a, b and c are increased by 50%, 10% and 20% respectively. The total marks of students increased by

Answer 1

Answer:

hope it helps please mark as brainliest...

Answer 2

The total marks of students increased by 27.55%

Step-by-step explanation:

Given,

The ratio of the marks of a, b and c = 17:14:18,

Let a's marks = 17x, b's marks = 14x and c's marks = 18x,

i.e. total marks = 17x + 14x + 18x = 49x

Where,

x is any positive real number,

After increasing marks of a, b and c by 50%, 10% and 20% respectively,

New marks of a = 150% of 17x = 1.5(17x) = 25.5x,

New marks of b = 110% of 14x = 1.1(14x) = 15.4x,

New marks of a = 120% of 18x = 1.2(18x) = 21.6x,

Total new marks = 25.5x + 15.4x + 21.6x = 62.5x

Hence, the total increment in marks = $\frac{\text{New marks-original marks}}{\text{Original marks}}\times 100$

$=\frac{62.5x-49x}{49x}\times 100$

$=\frac{13.5}{49}\times 100$

$=\frac{1350}{49}$

= 27.55%

#Learn more:

The marks of 3 students A, B and C are  in the ratio 10:12:15. If the maximum  marks of the paper are 100, then the  marks of B?​

https://brainly.in/question/9847139