Express the following ratios in the language of daily life: In an examination, the ratio of the number of students passing the examination to the total number of students that appeared in the examination is 4:5. Water is formed by combining volumes of oxygen and hydrogen in the ratio 1:2. To dilute an acid, students were asked to mix acid and water in the ratio 2:3.

Express the following ratios in the language of daily life: (i) In an examination, the ratio of the number of students passing the examination to the total number of students that appeared in the examination is 4:5. (ii) Water is formed by combining volumes of oxygen and hydrogen in the ratio 1:2. (iii) To dilute an acid, students were asked to mix acid and water in the ratio 2:3.

100 students appeared in annual exami-nation. 60 students passed. The ratio of the number of students who failed to the total number of students is

The number of students passing mathematics test is 75% of the number that appeared.This can be express in ratio form as:

Study the following histogram and answer the given question. What is the ratio of the number of students who scored 30 or more marks, but below 40 marks, to the total number of students in the entrance examination?

Suppose n students appear in an examination. Let X = the number of students who pass the examination. Suppose P(X=k)=lambdak^2 , then value of lambda is

In a class, there are 225 students. Which of the following cannot be the ratio of the number of sutdents passed to the number of students failed?

Express the following ratios in language of daily life: The ratio of the number of bad pencils to that of good pencils produced in a factory is 1L. In India, the ratio of the number of villages to that of cities is about 2000:1.

Express the following ratios in language of daily life: (i)The ratio of the number of bad pencils to that of good pencils produced in a factory is 1:9. (ii)In India, the ratio of the number of villages to that of cities is about 2000:1.

Express each of the following in the language of ratios: In a class, the number of girls in the merit list of the board examination is two times that of boys. The number of students passing mathematics test is 2/3 of the number that appeared.