If Ramesh score 50 marks in English and 60 marks in Math. Find out the average marks he secure.

Rahul scores 80 marks in English and x marks in Hindi. What is his total score in the two subjects?

Saina secure 70 marks in Science and 80 marks in Mathematics. Find a. the ratio of Sania's marks in Science to her marks in Mathematics. b. the ratio of Sania's marks in Mathematics to her marks is Science.

In the first four papers each of 100 marks, Rishi got 95 ,72 ,73 ,83 marks. If he wants an average of greater than or equal to 75 marks and less than 80 marks, find the range of marks he should score in the fifth paper.

Rita scored 20 marks more in Maths than the marks scored in English. Give an expression for: a. her marks in English if her marks in Maths are x. b. her marks in Maths if her marks in English are y.

Nandani secured 27 marks in Science and 32 marks in Social Studies. Find the ratio of her marks in Science to her marks in Social Studies.

Antony secured 324 marks out of 400 marks. Find the percentage of marks secured by Antony.

The line of regression marks in economics (X) for marks in mathematics (Y) for a class of 50 students is 3y - 5x+180 = 0. Average score in mathematics is 44 and variance of marks in economics is 9/16th , of variance of marks in mathematics. Find the average score in economics and also the coefficient of correlation between marks in economics and mathematics.

Anjali scores 100 marks in Mathematics and x marks in Science. what is her total score in Science and Mathematics?

In Figure, the pie-chart shows the marks obtained by a student in an examination. If the student secures 440 marks in all, calculate his marks in each of the given subjects.

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?