A candidate obtains the following percentage of marks in an examination :
Find the weighted mean if weights 2, 1,5,5,3, are alloted to Eglish, Hidi Mathematics, Physics, Chemistry.

find the mean of data 3,5,8,1,4,6

Examine whether the following are rational or irrational (sqrt5+3)^2

If a football team scored following number of goals in 1 matches, then find mean and median of the given data: 2,3,4,5,0,1,4,5,4,3

In a survey of 25 students, it was found that 15 had taken Mathematics, 12 had taken Physics and 11 had taken Chemistry, 5 had takes Mathematics and Chemistry, 9 had taken Mathematics and Physics, 4 had taken Physics and Chemistry and 3 had taken all three subjects. Find the number of students that had taken : Mathematics and Physics but not Chemistry.

Find and correct the errors in the following mathematical statements: 3x + 2x = 5x^2

Find and correct the errors in the following mathematical statements: 2x + 3y = 5xy

A teacher analyses the performance of two sections of students in a mathematics test of 100 marks given in the following table : : Find the probability that a student obtained less than 20% in the mathematics test.

Find and correct the errors in the following mathematical statements: x + 2x + 3x = 5x