Check sibling questions

Ex  15.1, 8 - The distance of 40 engineers from their - Ex 15.1

Ex  15.1, 8 - Chapter 15 Class 9 Probability - Part 2


Ex  15.1, 8 - Chapter 15 Class 9 Probability - Part 3

Ex  15.1, 8 - Chapter 15 Class 9 Probability - Part 4


Transcript

Ex15.1, 8 The distance (in km) of 40 engineers from their residence to their place of work were found as follows. What is the empirical probability that an engineer lives: less than 7 km from her place of work? Total number of engineers = 40 Number of engineers living less than 7 km from their place of work = 9 P(engineer lives less than 7 km from her place of work) = (π‘π‘’π‘šπ‘π‘’π‘Ÿ π‘œπ‘“ π‘’π‘›π‘”π‘–π‘›π‘’π‘’π‘Ÿπ‘  𝑙𝑖𝑣𝑖𝑛𝑔 𝑙𝑒𝑠𝑠 π‘‘β„Žπ‘Žπ‘› 7π‘˜π‘š π‘“π‘Ÿπ‘œπ‘š β„Žπ‘’π‘Ÿ π‘π‘™π‘Žπ‘π‘’ π‘œπ‘“ π‘€π‘œπ‘Ÿπ‘˜)/(π‘‡π‘œπ‘‘π‘Žπ‘™ π‘›π‘’π‘šπ‘π‘’π‘Ÿ π‘œπ‘“ π‘’π‘›π‘”π‘–π‘›π‘’π‘’π‘Ÿπ‘ ) = 9/40 Ex15.1, 8 (Method 1) The distance (in km) of 40 engineers from their residence to their place of work were found as follows. What is the empirical probability that an engineer lives: (ii) more than or equal to 7 km from her place of work? Total number of engineers = 40 Number of engineers living more than or equal to 7 km from their place of work = 40 – 9 = 31 P(engineer lives less than 7 km from her place of work) = (π‘π‘’π‘šπ‘π‘’π‘Ÿ π‘œπ‘“ π‘’π‘›π‘”π‘–π‘›π‘’π‘’π‘Ÿπ‘  𝑙𝑖𝑣𝑖𝑛𝑔 𝑙𝑒𝑠𝑠 π‘‘β„Žπ‘Žπ‘› 7π‘˜π‘š π‘“π‘Ÿπ‘œπ‘š β„Žπ‘’π‘Ÿ π‘π‘™π‘Žπ‘π‘’ π‘œπ‘“ π‘€π‘œπ‘Ÿπ‘˜)/(π‘‡π‘œπ‘‘π‘Žπ‘™ π‘›π‘’π‘šπ‘π‘’π‘Ÿ π‘œπ‘“ π‘’π‘›π‘”π‘–π‘›π‘’π‘’π‘Ÿπ‘ ) = 31/40 Ex15.1, 8 (Method 2) The distance (in km) of 40 engineers from their residence to their place of work were found as follows. What is the empirical probability that an engineer lives: (ii) more than or equal to 7 km from her place of work? P(engineer lives more than or equal to 7 km from her place of work) = 1 – P(engineer lives less than 7 km from her place of work) = 1 – 9/40 = (40 βˆ’ 9)/40 = 31/40 Ex15.1, 8 The distance (in km) of 40 engineers from their residence to their place of work were found as follows. What is the empirical probability that an engineer lives: (iii) within 1/2 km from her place of work? Total number of engineers = 40 Number of engineers living within 1/2 km from their place of work = 0 P(engineer living within 1/2 km from their place of work) =(π‘π‘’π‘šπ‘π‘’π‘Ÿ π‘œπ‘“ π‘’π‘›π‘”π‘–π‘›π‘’π‘’π‘Ÿπ‘  𝑙𝑖𝑣𝑖𝑛𝑔 π‘€π‘–π‘‘β„Žπ‘–π‘› 1/2 π‘˜π‘š π‘“π‘Ÿπ‘œπ‘š π‘‘β„Žπ‘’π‘–π‘Ÿ π‘π‘™π‘Žπ‘π‘’ π‘œπ‘“ π‘€π‘œπ‘Ÿπ‘˜)/(π‘‡π‘œπ‘‘π‘Žπ‘™ π‘›π‘’π‘šπ‘π‘’π‘Ÿ π‘œπ‘“ π‘’π‘›π‘”π‘–π‘›π‘’π‘’π‘Ÿπ‘ ) = 0/40 = 0

Davneet Singh's photo - Co-founder, Teachoo

Made by

Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.