Example 3 - Number of wickets taken by bowlers in one-day - Mean

  1. Class 10
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Example 3 - Chapter 14 Class 10 - NCERT The distribution below shows the number of wickets taken by bowlers in one-day cricket matches. Find the mean number of wickets by choosing a suitable method. What does the mean signify? Number of wickets Number of bowlers Class mark(xi) fi xi 20 – 60 7 (20 + 60)/2 = 40 7 × 40=280 60 – 100 5 (60 + 100)/2 = 80 5 × 80=400 100 – 150 16 (100 + 150)/2 = 125 16 × 125=2000 150 – 250 12 (150 + 250)/2 = 200 12 × 200=2400 250 – 350 2 (250 + 350)/2 = 300 2 × 300=600 350 – 450 3 (350 + 450)/2 = 400 3 × 400=1200 We will do the question by direct method as class interval is not same Mean(𝑥 ̅) = (∑▒𝑓𝑖𝑥𝑖)/(∑▒𝑓𝑖) 𝑥 ̅ = 6880/45 𝑥 ̅ = 152.89 Mean number of wickets = 152.89

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Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 8 years. He provides courses for Maths and Science at Teachoo. You can check his NCERT Solutions from Class 6 to 12.