Question

OI COPPU
36% of the maximum marks is required to pass a test. A student gets 123 marks and is
declared fail by 39 marks. Find the maximum marks.
8. A fruit-seller had some apples. He sells 40% of them and still has 420 apples. Find the
number of apples he had originally,
9. In an examination, 72% of the total examinees passed. If the number of failures is 392, find
the total number of examinees.
10. After deducting a commission of 5%, a moped costs *15200. What is its gross value?
11. Gunpowder contains 75% of nitre and 10% of sulphur, and the rest of it is charcoal. Find
the amount of charcoal in 8 kg of gunpowder.
12. Chalk contains 3% of carbon, 10% of calcium and 12% of oxygen. Find the amount in grams
of each of these substances in 1 kg of chalk.​

Answer 1

Answer:

do we have to do all of them??

Step-by-step explanation:

Answer 2

Answer:

11 answer ....

Step-by-step explanation:

nitrogen contain= 75 percent

suphur contain = 10 percent so , 75 + 10 = 85 so, 100percent - 85 percent = 15 percent of charcoal