Mathematics 2021 Past Questions | WAEC

Study the following Mathematics past questions and answers for JAMBWAEC  NECO and Post-JAMB. Get prepared with official past questions and answers for upcoming examinations.

46. A box contains 40 identical balls of which 10 are red and 12 are blue. If a ball is selected at random from the box, what is the probability that it is neither red nor blue?

 

  • A.9/20
  • B. 3/10
  • C. 1/4
  • D. 11/20

47.  A fair die is tossed twice. What is the probability of getting at least 10?

  • A. 5/36
  • B. 2/3
  • C. 5/18
  • D. 1/6

48. A man will be (x + 10) years old in 8 years time. If 2 years ago, he was 63 years, find the value of x

  • A. 55
  • B. 63
  • C. 57
  • D.67

49.  The equation of a line is given as 3x – 5y = 7. Find its gradient (slope).

  • A. 5/3
  • B. 3/5
  • C. -3/5
  • D. -5/3

50.  For what value of x 4-2x/x+1 undefined?

  • A. 22
  • B. 24
  • C. 36
  • D. 26
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