In a class test, the sum of Shefali's marks in Mahematics and English is 30. Has she got 2 marks more in Mathematics and 3 marks less in English, the product of those marks would have been 210. Find her marks in the two subjects.

In a class test, the sum of Moulika’s marks in Mathematics and English is 30. If she got 2 marks more in Mathematics and 3 marks less in English, the product of her marks would have been 210. Find her marks in the two subjects.

Find the probability that a student obtained less than 20 marks in the mathematics test .

The information regarding the marks scored by 30 students in a 20 mark test of Mathematics is given below: Find the mean of the data.

The marks distribution of 30 students in a mathematics examination are given in Table 3 of Example 1 . Find the mode of this data.

Had Arya scored 10 more marks in her mathematics test out of 30 marks. 9 times these marks would have been the square of her actual marks. How many marks did she score in the test ? (No negative marking system in the test.)

The marks scored by 40 students in a 60 mark test of english are as follows , Prepare the frequency distribution with classes 0-9,10-19,…..

(i) Find the probability of the students getting more than 40 marks. (2) Find the probability of the students getting less than 30 marks.

Form the pair of linear equations in the following problems and find their solutions (if they exist) by any algebraic method: Yash scored 40 marks in a test, getting 3 marks for each right answer and losing 1 mark for each wrong answer. Had 4 marks been awarded for each correct answer and 2 marks been deducted for each incorrect answer, then Yash would have scored 50 marks. How many questions were there in the test?

Ravi obtained 70 and 75 marks in first two unit test. Find the minimum marks he should get in the third test to have an average of at least 60 marks.