Question

Ishu, Dev and Karim wrote an exam. Ishu scored 95\% . Her score was 570 marks.

How many marks did Dev score if he scored 81\% ?

If Karim scored 522 marks, what is his percentage score?

Answer 1

Step-by-step explanation:

let the total marks be x.

given,

marks% of ishu=95%

and,marks of ishu=570

and,marks% of dev=81%

and,marks of Karim=522

A/q,

95% of x=570

or,95/100×x=570

or,19/20×x=570

or,19x/20=570

or,19x=570×20

or,19x=11400

or,x=11400/19

so,x=600

so,total marks=600

hence,marks of dev=81% of 600=81/100×600=486

and,marks% of Karim=(522/600×100)%=87%

please mark it as brainliest.