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Ex  15.1, 1 - In a cricket match, a batswoman hits a - Finding probability

  1. Chapter 15 Class 9 Probability
  2. Serial order wise
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Ex 15.1, 1 (Method 1) In a cricket match, a batswoman hits a boundary 6 times out of 30 balls she plays. Find the probability that she did not hit a boundary. Total number of balls played = 30 Number of times the batswoman hits a boundary = 6 ∴ Number of balls the batswoman does not hit a boundary = 30 − 6 = 24 P(she does not hit a boundary) =(𝑁𝑢𝑚𝑏𝑒𝑟 𝑜𝑓 𝑏𝑎𝑙𝑙𝑠 𝑤ℎ𝑒𝑛 𝑠ℎ𝑒 𝑑𝑜𝑒𝑠 𝑛𝑜𝑡 ℎ𝑖𝑡 𝑏𝑜𝑢𝑛𝑑𝑎𝑟𝑦)/(𝑇𝑜𝑡𝑎𝑙 𝑛𝑢𝑚𝑏𝑒𝑟 𝑜𝑓 𝑏𝑎𝑙𝑙𝑠 𝑝𝑙𝑎𝑦𝑒𝑑) = 24/30 = 4/5 Ex 15.1, 1 (Method 2) In a cricket match, a batswoman hits a boundary 6 times out of 30 balls she plays. Find the probability that she did not hit a boundary. Total number of balls played = 30 Number of balls the batswoman hits a boundary = 6 P(she does not hit a boundary) = 1 – P(she hits a boundary) P(she hits a boundary) = 6/30 = 1/5 P(she does not hit a boundary) = 1 – P(she hits a boundary) = 1 – 1/5 = (5 − 1)/5 = 4/5

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