If $\large (a+b-6)^2 + a^2+b^2+1+2b = 2ab+2a$, then the value of a is
1). 7
2). 6
3). 3.5
4). 2.5
If percentage of profit made,when an article is sold for Rs.78, is twice as when it is sold for Rs.69, the cost price of the article is
1). Rs. 49
2). Rs. 51
3). Rs. 57
4). Rs. 60
ABC IS A TRIANGLE IF SIN $\frac{a+b}{2}= \frac{\sqrt{3}}{2}, $then the value of$ sin\frac{c}{2}$ is
1). $\frac{1}{\sqrt{2}}$
2). 0
3). 1/2
4). $\frac{\sqrt{3}}{2}$
If the salary of Manoj is 40% less than that of Subhash, then by how much percentage is the salary of Subhash more than that of Manoj?
1). 60%
2). $66\frac{1}{4}$%
3). $66\frac{2}{3}$%
4). 65%
In a class, average height of all students is 'a' cms. Among them, average height of 10 students is 'b' cms and the average height of the remaining students is 'c' cms. Find the number of students in the class. (Here a>c and b>c )
1). (a(b-c))/(a-c)
2). ((b-c))/((a-c))
3). (b-c)/(10(a-c))
4). (10(b-c))/(a-c)