Probability

Chapter 5 Class 8 Data Handling
Concept wise

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### Transcript

Ex 5.3, 4 Numbers 1 to 10 are written on ten separate slips (one number on one slip), kept in a box and mixed well. One slip is chosen from the box without looking into it. What is the probability of . (i) getting a number 6? Total number of slips = 10 Number of Slips with 6 written on them = 1 Probability = (ππ’ππππ ππ π ππππ  π€ππ‘β 6 π€πππ‘π‘ππ ππ π‘βππ)/(πππ‘ππ ππ’ππππ ππ π ππππ ) = π/ππ Ex 5.3, 4 (ii) getting a number less than 6? Slips with a number less than 6 = 1, 2, 3, 4, 5, 6 Number of slips with a number less than 6 = 5 Probability = (ππ’ππππ ππ π ππππ  π€ππ‘β π ππ’ππππ πππ π  π‘βππ 6)/(πππ‘ππ ππ’ππππ ππ π ππππ ) = 5/10 = π/π Ex 5.3, 4 (iii) getting a number greater than 6? Slip with a number greater than 6 = 7, 8, 9, 10 Number of slips greater than 6 written on them = 4 Probability = (ππ’ππππ ππ π ππππ  πππππ‘ππ π‘βππ 6 )/(πππ‘ππ ππ’ππππ ππ π ππππ ) = 4/10 = π/π Ex 5.3, 4 (iv) getting a 1-digit number? One digit number = 1, 2, 3, 4, 5, 6, 7, 8, 9 β΄ Number of slips with one-digit number= 9 Probability = (ππ’ππππ ππ π ππππ  π€ππ‘β πππ πππππ‘ ππ’ππππ)/(πππ‘ππ ππ’ππππ ππ π ππππ ) = 9/10