Unit 5: Statistics, Data Analysis and Probability
Calculate the arithmetic mean of the following data :
Weekly wages (₹): 11-13 | 13-15 | 15-17 | 17-19 | 19-21 | 21-23 | 23-25
Number of Labour: 3 | 4 | 5 | 6 | 5 | 4 | 3
A, B and C try to hit a target. A can hit the target 3 times in 5 shots, B, 2 times in 5 shots and C, 3 times in 4 shots. Find the probability of the following events :
(a) Any two of them hit
(b) At least two of them hit
Find the mode for the following frequency distribution: Class interval 25-30/30-35/35-40/40-45/45-50/50-55, Frequency 20/53/42/42/38/36.
Show AnswerTwo players, Sita and Geeta, play a Table-tennis match. It is known that the probability of Sita winning the match is 0.59. What is the probability of Geeta winning the match ?
Show AnswerThe ages of 50 women who have committed suicide is given below. Find out the average age of the women from it.
Age of women in years : 15-20, 20-25, 25-30, 30-35, 35-40, 40-45, 45-50, 50-55, 55-60, 60-65
No. of women : 8, 10, 8, 6, 4, 7, 3, 2, 2, 0
N = 50
Two players, Sangeeta and Reshma play a tennis match. It is known that the probability of Sangeeta winning the match is 0.62. What is the probability of Reshma winning the match ?
Show AnswerStudy the following table carefully and answer the questions given below :
Sports | Total players percentage | Male : Female Players
Boxing | 15 | 2 : 1
Chess | 12 | 1 : 1
Snooker | 8 | 1 : 7
Swimming | 13 | 1 : 4
Badminton | 26 | 1 : 1
Cricket | 16 | 3 : 1
Shooting | 10 | 2 : 3
Total number of Players = 100
(a) What is the total number of female players ?
(b) In which sport maximum number of male players participated ?
(c) What is the percentage of male players participated in snooker to all the players (male and female) ?