Case Study Based- 4
100m RACE
A stopwatch was used to
find the time that it took a
group of students to run 100 m.
Last updated at Oct. 27, 2020 by Teachoo
Transcript
Question 20 Case Study Based- 4 100m RACE A stopwatch was used to find the time that it took a group of students to run 100 m. (a) Estimate the mean time taken by a student to finish the race. (i) 54 (ii) 63 (iii) 43 (iv) 50 Mean(๐ฅ ฬ ) = (โโ๐๐๐๐)/(โโ๐๐) = 1720/40 = 43 Mean time is 43 (b) What wiil be the upper limit of the modal class ? (i) 20 (ii) 40 (iii) 60 (iv) 80 Modal class is class with highest frequency โด 40 โ 60 is the modal class And Upper limit = 60 (c) The construction of cummulative frequency table is useful in determining the (i) Mean (ii) Median (iii) Mode (iv) All of the aboveCummulative frequency table is used to find the Median (d) The sum of lower limits of median class and modal class is (i) 60 (ii) 100 (iii) 80 (iv) 140 Modal class is class with highest frequency โด 40 โ 60 is modal class To find Median Class, We find cummulative freqeuncy ๐/2=40/2 = 20 โด 40 โ 60 has cummulative frequency greater than 20 Thus, 40 โ 60 is the Median Class โด Sum of Lower Limits of Median class and Modal class = 40 + 40 = 80 (e) How many students finished the race within 1 minute? (i) 18 (ii) 37 (iii) 31 (iv) 8 Students finished the race within 1 minute = Students between 0 โ 20 + Students between 20 โ 40 + Students between 40 โ 60 = 8 + 10 + 13 = 31
CBSE Class 10 Sample Paper for 2021 Boards - Maths Standard
Question 1 (Choice - 2)
Question 2
Question 3 Important
Question 4
Question 5 (Choice - 1)
Question 5 (Choice - 2)
Question 6
Question 7 (Choice - 1)
Question 7 (Choice - 2)
Question 8 Important
Question 9 (Choice - 1)
Question 9 (Choice - 2) Important
Question 10
Question 11 Important
Question 12
Question 13
Question 14
Question 15
Question 16 (Choice - 1)
Question 16 (Choice - 2)
Question 17 Important
Question 18 Important
Question 19 Important
Question 20 Important You are here
Question 21 Important
Question 22 (Choice - 1)
Question 22 (Choice - 2)
Question 23 Important
Question 24
Question 25 (Choice - 1)
Question 25 (Choice - 2)
Question 26 Important
Question 27
Question 28 (Choice - 1)
Question 28 (Choice - 2)
Question 29 Important
Question 30 (Choice - 1) Important
Question 30 (Choice - 2)
Question 31 Important
Question 32
Question 33 Important
Question 34 (Choice - 1)
Question 34 (Choice - 2)
Question 35 Important
Question 36 Important
CBSE Class 10 Sample Paper for 2021 Boards - Maths Standard
About the Author