Question

answer all

1)The pass marks of any subject is 40% .Anil gets 85,5 marks above the pass marks . Find the maximum marks.

2)15% increased price of a paint is Rs.1380 .Find the original price.

3)In an examination 90% of students passed out of the 150 students.Find the number of students failed in examination.

Answer 1

1) 85-5=80 are the pass marks
let y be the total marks
y × 40% =80

$y \times \frac{40}{100} = 80 \\ y = 200$

2)let y be the original price
$y + (y \times \frac{15}{100} ) = 1380 \\ \frac{115y}{100} = 1380 \\ y = \frac{1380 \times 100}{115} \\ y = 1200$
3)150 × (90/100) = 135 members passed
so no. of students failed = 150-135=15