Q26. Division A has 15 students and division B has 20 students. Average score of students in division A is greater by 2 as compared to the average score of students in division B. The total marks of all the students in divi- sion B is 160 more than total marks of all the students in division A. Find the average marks of students in division A

Step-by-step explanation:

Let a be the total score of Div. A

Let b be the total score of Div. B

given,

as equation 1.

and

as equation 2.

Now multiply equation 2 by 1/20 to eliminate b to solve for a.

take this new equation as equation 3.

now we will use equation 1 + equation 3 to eliminate b to solve for a.

Div.A total score = 600

Average Score = Total Score / Number of students.

hope it you

step-by-step explanation:

sin(7pi/6 - pi/3)  

= sin(7pi/6 - 2pi/6)  

= sin(5pi/6)  

= sin(pi - pi/6)  

= sin(pi/6)  

= 1/2  

sin 7pi/6 - sin pi/3  

= sin (pi + pi/6) - sin pi/3  

= -sin pi/6 - sin pi/3  

= -1/2 - sqrt(3)/2  

= -(1+sqrt(3))2