NCERT Solutions for Class 11 Maths Chapter 16

DOWNLOAD FREE NCERT Solutions for Class 11 Maths Chapter 16 Probability प्रायिकता in PDF form. If you want to do class 12th without doing 11th class, go for NIOS Online Admission. Students studying in inter college, should also see Link Study Material Issued by CBSE.



NCERT Solutions for Class 11 Maths Chapter 16

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Class 11 Maths Chapter 16 Probability Solutions



Important Extra Questions on Probability

  1. A coin is tossed. If it shows head, we draw a ball from a bag consisting of 2 red and 3 black balls. If it shows tail, coin is tossed again. [Answer: {HR1, HR2, HB1, HB2, HB3, TH, TT}]
  2. Two balls are drawn at random in succession without replacement from a box containing 1 red and 3 identical white balls. [Answer: {RW, WR, WW}]
  3. A coin is tossed n times. Find the number of element in its sample space. [Answer: 2^n]
  4. One number is chosen at random from the numbers 1 to 21. What is the probability that it is prime? [Answer: 8/21]
  5. What is the probability that a given two-digit number is divisible by 15? [Answer: 1/15]




Questions for Practice
  1. A game has 18 triangular block out of which 8 are blue and rest are red, and 19 square blocks out of which 7 are blue and rest are yellow. On piece is lost. Find the probability that it was a square of blue colour. [Answer: 1/4]
  2. In a leap year find the probability of
    • (i) 53 Mondays and 53 Tuesdays
    • (ii) 53 Mondays and 53 Wednesday
    • (iii) 53 Mondays or 53 Tuesdays. [Answer: (i) 1/7, (ii) 0, (iii) 3/7]
  3. In a non-leap year, find the probability of
    • (i) 53 Mondays and 53 Tuesdays.
    • (ii) 53 Mondays or 53 Tuesdays. [Answer: (i) 0, (ii) 2/7]
  4. Two card are drawn at random from a deck of 52 playing cards. Find the probability of drawing two kings. [Answer: 1/221]
  5. Find the probability that in a random arrangement of the letters of the word UNIVERSITY two I’s come together. [Answer: 1/5]



Try These
  1. Out of 8 points in a plane 5 are collinear. Find the probability that 3 points selected at random form a triangle. [Answer: 23/28]
  2. Find the probability of at most two tails or at least two heads in a toss of three coins. [Answer: 7/8]


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