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MCQs

Total Questions : 72 | Page 5 of 8 pages
Question 41. If 2x+y = 10, 2y+z = 20 and 2x+z = 30. Where x, y,and z are real number. What is the value of 2x ?
  1.    3/2
  2.    sqrt(15)
  3.    sqrt(6)/2
  4.    15
 Discuss Question
Answer: Option B. -> sqrt(15)




Question 42. Two dices are thrown simultaneously. What is the probability that the sum of the two number is 10 or the product of two numbers is >= 25 or both?
  1.    5/27
  2.    4/27
  3.    5/36
  4.    None of these
 Discuss Question
Answer: Option A. -> 5/27




Question 43. If sin? + cos? = v2sin?, then
  1.    v2 cos?
  2.    - v2 sin?
  3.    - v2 cos?
  4.    None of these
 Discuss Question
Answer: Option A. -> v2 cos?




Question 44. Value of is
  1.    -1 / 2
  2.    1 / 2
  3.    v3 / 2
  4.    None of these
 Discuss Question
Answer: Option A. -> -1 / 2




Question 45. If sin? + cosec? = 2, then value of sin3? + cosec3? is
  1.    2
  2.    4
  3.    6
  4.    8
 Discuss Question
Answer: Option A. -> 2




Question 46. If cosec? + cot ? = 5 / 2 , then the value of tan? is
  1.    15 / 16
  2.    21 / 20
  3.    15 / 21
  4.    20 / 21
 Discuss Question
Answer: Option D. -> 20 / 21




Question 47. In how many ways can 10 engineers and 4 doctors be seated at a round table if all the 4 doctors do not sit together?
  1.    13! - (10! × 4!)
  2.    13! × 4!
  3.    14!
  4.    10! × 4!
 Discuss Question
Answer: Option A. -> 13! - (10! × 4!)




Question 48. If length of the sides AB, BC and CA of a triangle are 8cm, 15 cm and 17 cm respectively, then length of the angle bisector of ?ABC is
  1.    120 v2 / 23cm
  2.    60 v2 / 23cm
  3.    30 v2 / 23cm
  4.    None of these
 Discuss Question
Answer: Option A. -> 120 v2 / 23cm




Question 49. A man from the top of a 100 metre high tower sees a car moving towards the tower at an angle of depression of 300. After sometimes, the angle of depression becomes 600. The distance (in metres) traveled by the car during this time is
  1.    100 v3
  2.    200 v3 / 3
  3.    100 v3 / 3
  4.    200 v3
 Discuss Question
Answer: Option B. -> 200 v3 / 3




Question 50. The shadow of a tower of height (1 + v3) metre standing on the ground is found to be 2 metre longer when the sun's elevation is 300, then when the sun's elevation was
  1.    300
  2.    450
  3.    600
  4.    750
 Discuss Question
Answer: Option B. -> 450




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