The mean height of the 10 girls of a class is 1.4 m and the mean height of the 30 boys of the class is 1.45 m. Find the approximate mean height of the 40 students of the class. (a) 1.39 m (b) 1.46 m (c) 1.42 m (d) 1.44 m
If xcos3θ + ysin3θ = sinθcosθ and xcosθ = ysinθ, then x2 + y2 = (a) 0 (b) 4 (c) 1 (d) 2
What is the sum of an A.P. whose first term is a, the second term is b and the last term is c? (a) (b) (c) (d)
If H.C.F of (x - 5)(x2 - x - a) and (x - 4) (x2 - 2x - b) is (x - 4)(x - 5), find the values of a and b respectively. (a) 15, 18 (b) 10, 7 (c) -8, 10 (d) 12, 15
If the third, fourth, fifth, seventh and tenth letters of the word PERSONALITY forms a meaningful word then first letter of the word is the answer. If no word is possible, then 'X' is the answer and if more than one such word is formed, then 'M' is the answer. (a) R (b) X (c) O (d) M
If represents 3, represent 9, then which of the following represents
27 + 9? (a) (b) (c) (d)
How many rectangles are there in the given figure ?
(A) 6
(B) 5
(C) 4
(D) 3
Which shape is that which fits the missing part of the given figure ?
(A)
(B)
(C)
(D)
Number of standing lines in the given figure is ____.
(A) 7
(B) 8
(C) 9
(D) 10