Question
The total number of students in class A and B is 72. The
number of students in A is 40% more than that in B. The average marks of students in B are 50% more than that of students in A. If the average marks of all the students in A and Bare 58, then what are the average marks of students in A?Solution
Let the number of students in class B is x then the number of students in class A will be = 1.4x Let the average marks of students in class A is y then the average marks of students in class B will be = 1.5y Now given, average of both the class is 58. Thus, (1.4x × y + x ×1.5y)/(x+1.4x) =58 1.4y +1.5y =58×2.4 y = (58×2.4)/2.9 =48.
Statements: Â A % B & G % B; B # L & J; J @ K # S
Conclusions:
I. L @ K
II. A % K
III. S @ B
...Statements: M = R ≥ S , N = O > Q, Q > W = A < S
Conclusions :I. N ≥ S
II. W > R
III. O ≤ S
Statements: A$K; E#N; K@E
Conclusions:
I) A$N
II) A@N
Which of the following letters should be placed in the blank spaces respectively (in the same order from left to right) to complete the given expression...
What is the suitable sign that should be placed so that O > K is true, and J ≤ M is true in the relation 'J = K ≤ L ( ) M < N = O'?
Statements : Z < S < W < D; E ≤ C ≤ Y < D; U < T < S ≤ V
Conclusions :
I. V > Z
II. C < U
III. V > E
Statements: M > T, P > R, T = Q, U ≥ Q, P = U
Conclusion:
I. M ≥ R
II. R > M
Statements: T @ A % S $ L © JÂ
Conclusions:Â
 I. T % LÂ
II. T $ LÂ
III. S # J
Statements: A > C = B ≥ D ≥ F, B = G ≤ H < E
Conclusions:
I. A > G
II. H ≥ F
III. E > C
Statements: R = S > Y ≥ T = W ≥ U > V > X
Conclusions:
I. Y < X
II. S > V
III. U ≤ R